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Table 1 Summary of study specifications (prevalence of anencephaly)

From: Global prevalence of congenital anencephaly: a comprehensive systematic review and meta-analysis

First author, year, References

Report year

Continent

Country

Sample size

Number of patients with Anencephaly

Gong-1, 2017, [1]

2006

Asia

China

306,734

227

Gong-2, 2017, [1]

2007

Asia

China

341,432

244

Gong-3, 2017, [1]

2008

Asia

China

330,414

186

Gong-4, 2017, [1]

2009

Asia

China

321,353

166

Gong-5, 2017, [1]

2010

Asia

China

307,826

168

Gong-6, 2017, [1]

2011

Asia

China

304,079

158

Gong-7, 2017, [1]

2012

Asia

China

353,108

145

Gong-8, 2017, [1]

2013

Asia

China

321,171

141

Gong-9, 2017, [1]

2014

Asia

China

364,400

108

Gong-10, 2017, [1]

2015

Asia

China

298,437

55

PEI, 2009, [2]

2004–2006

Asia

China

4175

28

Afshar, 2006, [3]

1997–2001

Asia

Iran

16,785

23

Golalipour-1, 2007, [4]

1998–2003

Asia

Iran

37,951

43

Li, 2006, [5]

2003

Asia

China

11,534

76

LIAN, 1987, [6]

1970–1984

Asia

China

208,801

461

Golalipour-2, 2010, [7]

1998–2005

Asia

Iran

30,639

35

Xie, 2020, [8]

2015–2018

Asia

China

705,395

188

Khattak, 2010, [9]

2007

Asia

SWAT

5560

63

Golalipour-3, 2010, [10]

1998–2005

Asia

Iran

49,534

56

Zhang-1, 2012, [11]

2005–2008

Asia

China

62,443

43

Jung-1, 1999, [12]

1993

Asia

Korea

601,376

156

Jung-2, 1999, [12]

1994

Asia

Korea

601,459

255

Jaruratanasirikul, 2014, [13]

2009–2012

Asia

Thailand

148,759

12

Zhu-1, 2012, [14]

2006

Asia

China

643,987

407

Zhu-2, 2012, [14]

2007

Asia

China

777,397

454

Zhu-3, 2012, [14]

2008

Asia

China

843,920

465

Jin-1, 2017, [15]

2006

Asia

China

22,559

16

Jin-2, 2017, [15]

2007

Asia

China

26,874

13

Jin-3, 2017, [15]

2008

Asia

China

28,291

19

Jin-4, 2017, [15]

2009

Asia

China

27,916

20

Jin-5, 2017, [15]

2010

Asia

China

26,973

12

Jin-6, 2017, [15]

2011

Asia

China

28,424

9

Jin-7, 2017, [15]

2012

Asia

China

32,489

13

Kant, 2017, [16]

2001–2014

Asia

India

26,946

33

Liu, 2007, [17]

1996–2004

Asia

China

99,888

42

Ebrahimi, 2013, [18]

2005–2011

Asia

Iran

14,034

59

Ghavami, 2011, [19]

2005–2008

Asia

Iran

22,500

18

Kondo-1, 2019, [20]

2014

Asia

Japan

156,791

13

Kondo-2, 2019, [20]

2015

Asia

Japan

158,347

13

Tiwari, 2020, [21]

2014

Asia

India

14,681

19

IMAIZUMI-1, 1991, [22]

1948–1958

Asia

Japan

27,891

27

IMAIZUMI-2, 1991, [22]

1959–1969

Asia

Japan

40,715

22

IMAIZUMI-3, 1991, [22]

1970–1980

Asia

Japan

39,506

28

IMAIZUMI-4, 1991, [22]

1981–1990

Asia

Japan

23,884

17

Zhang-2, 2017, [23]

2006–2015

Asia

China

3,248,954

1600

Seto-1, 2003, [24]

1981–1990

Asia

Japan

136,846

39

Seto-2, 2003, [24]

1991–2000

Asia

Japan

117,332

7

Fakheri, 2004, [25]

1996–2001

Asia

Iran

81,538

106

PourIsa, 2005, [26]

1997–2003

Asia

Iran

21,074

29

Golalipour-4, 2004, [27]

1997–2001

Asia

Iran

26,280

39

Stoll-1, 2006, [28]

1988–1992

Europe

France

68,326

9

Stoll-2, 2006, [28]

1993–1995

Europe

France

39,286

4

Stoll-3, 2006, [28]

1996–2002

Europe

France

95,058

10

RICHARDS, 1972, [31]

1964–1966

Europe

Wales

92,980

2145

Stoll-4, 2011, [32]

1979–2008

Europe

France

402,532

182

Szabó-1, 2013, [33]

1980–1991

Europe

Hungary

209,762

64

Szabó-2, 2013, [33]

1994–2005

Europe

Hungary

155,978

29

Pietrzyk-1, 1983, [34]

1970–1972

Europe

Poland

33,766

9

Pietrzyk-2, 1983, [34]

1979- 1981

Europe

Poland

46,818

11

McDonnell-1, 1999, [35]

1980–1994

Europe

East Ireland

320,750

322

Boyd-1, 2000, [36]

2000

Europe

Denmark

8788

2

Boyd-2, 2000, [36]

2000

Europe

Netherlands

81,980

18

Boyd-3, 2000, [36]

2000

Europe

Austria

29,026

3

Boyd-4, 2000, [36]

2000

Europe

Croatia

10,718

2

Boyd-5, 2000, [36]

2000

Europe

France

60,705

15

Boyd-6, 2000, [36]

2000

Europe

Germany

18,280

7

Boyd-7, 2000, [36]

2000

Europe

Italy

204,178

34

Boyd-8, 2000, [36]

2000

Europe

Lithuania

95,469

29

Boyd-9, 2000, [36]

2000

Europe

Spain

38,166

14

Boyd-10, 2000, [36]

2000

Europe

Ukraine

44,761

11

Boyd-11, 2000, [36]

2000

Europe

UK

78,695

31

Salvador, 2011, [37]

1992–2006

Europe

Spain

197,003

87

DOLK-1, 1991, [38]

19,980–1987

Europe

UK& Ireland

577,989

739

DOLK-2, 1991, [38]

19,980–1986

Europe

Europe & Malta

378,849

184

Khoshnood-1, 2015, [39]

1991–2009

Europe

Austria

216,196

40

Khoshnood-2, 2015, [39]

1991–2011

Europe

Belgium

601,565

182

Khoshnood-3, 2015, [39]

2000–2009

Europe

Czech Republic

1,029,247

245

Khoshnood-4, 2015, [39]

1991–2010

Europe

Croatia

131 525

18

Khoshnood-5, 2015, [39]

1991–2011

Europe

Denmark

115 846

44

Khoshnood-6, 2015, [39]

1993–2010

Europe

Finland

1,070,940

314

Khoshnood-7, 2015, [39]

1991–2011

Europe

France

666,353

347

Khoshnood-8, 2015, [39]

1991–2011

Europe

Germany

360,801

95

Khoshnood-9, 2015, [39]

1998–2010

Europe

Hungary

1,260,719

256

Khoshnood-10, 2015, [39]

1991–2011

Europe

Ireland

702,747

244

Khoshnood-11, 2015, [39]

1991–2011

Europe

Italy

1,215,306

217

Khoshnood-12, 2015, [39]

1991–2010

Europe

Malta

88,573

25

Khoshnood-13, 2015, [39]

1991–2011

Europe

Netherlands

401,404

108

Khoshnood-14, 2015, [39]

1999–2011

Europe

Norway

775,060

282

Khoshnood-15, 2015, [39]

1999–2010

Europe

Poland

440,163

71

Khoshnood-16, 2015, [39]

1991–2010

Europe

Portugal

316,853

62

Khoshnood-17, 2015, [39]

1991–2010

Europe

Spain

361,416

189

Khoshnood-18, 2015, [39]

1991–2011

Europe

Switzerland

159,273

62

Khoshnood-19, 2015, [39]

1991–2011

Europe

UK

2,556,075

1361

Loane, 2009, [40]

2000–2004

Europe

UK

1,740,718

40

Peake, 2021, [41]

2006–2011

Europe

UK

1,351,405

673

Boyd-12, 2011, [42]

2005–2006

Europe

UK

601,545

366

Poretti, 2008, [43]

2001–2007

Europe

Switzerland

10,769,230

22

Obeid-1, 2015, [44]

2000–2010

Europe

Europe

9,161,189

3221

Obeid-2, 2015, [44]

2000–2010

Europe

Germany

227,781

56

GARNE, 2005, [45]

1995–1999

Europe

17 European regions

1,198,519

498

CADAS, 1978, [46]

1955–1965

Europe

Greece

74,390

49

Loncarek-1, 2001, [47]

1963

Europe

Croatia

2946

1

Loncarek-2, 2001, [47]

1966

Europe

Croatia

2988

1

Loncarek-3, 2001, [47]

1967

Europe

Croatia

2974

2

Loncarek-4, 2001, [47]

1971

Europe

Croatia

3582

1

Loncarek-5, 2001, [47]

1972

Europe

Croatia

3522

1

Loncarek-6, 2001, [47]

1973

Europe

Croatia

3580

1

Loncarek-7, 2001, [47]

1974

Europe

Croatia

3612

1

Loncarek-8, 2001, [47]

1975

Europe

Croatia

3692

1

Loncarek-9, 2001, [47]

1979

Europe

Croatia

4174

1

Loncarek-10, 2001, [47]

1980

Europe

Croatia

4242

1

Loncarek-11, 2001, [47]

1983

Europe

Croatia

4042

3

Loncarek-12, 2001, [47]

1988

Europe

Croatia

3655

1

Loncarek-13, 2001, [47]

1989

Europe

Croatia

3504

2

Loncarek-14, 2001, [47]

1992

Europe

Croatia

3647

1

Loncarek-15, 2001, [47]

1993

Europe

Croatia

3468

1

Loncarek-16, 2001, [47]

1994

Europe

Croatia

3326

1

Loncarek-17,2001, [47]

1996

Europe

Croatia

3412

1

Loncarek-18, 2001, [47]

1998

Europe

Croatia

3017

1

EUROCAT GROUP-1, 1991, [48]

1980–1986

Europe

Republic of Ireland

183,278

242

EUROCAT GROUP-2, 1991, [48]

1980–1986

Europe

UK

467,437

597

EUROCAT GROUP-3, 1991, [48]

1980–1986

Europe

Belgium

57,352

31

EUROCAT GROUP-4, 1991, [48]

1980–1986

Europe

Netherlands

50,437

33

EUROCAT GROUP-5, 1991, [48]

1980–1986

Europe

Denmark

32,648

17

EUROCAT GROUP-6, 1991, [48]

1980–1986

Europe

France

349,737

143

EUROCAT GROUP-7, 1991, [48]

1980–1986

Europe

Italy

63,261

28

EUROCAT GROUP-8, 1991, [48]

1980–1986

Europe

Malta

22,225

13

EUROCAT GROUP-9, 1987, [49]

1980–1983

Europe

Republic of Ireland

109,276

168

EUROCAT GROUP-10, 1987, [49]

1980–1983

Europe

UK

244,955

309

EUROCAT GROUP-11, 1987, [49]

1980–1983

Europe

Denmark

18,533

8

EUROCAT GROUP-12, 1987, [49]

1980–1983

Europe

Netherlands

23,150

13

EUROCAT GROUP-13, 1987, [49]

1980–1983

Europe

Belgium

60,034

25

EUROCAT GROUP-14, 1987, [49]

1980–1983

Europe

France

143,878

69

EUROCAT GROUP-15, 1987, [49]

1980–1983

Europe

Luxembourg

9148

3

EUROCAT GROUP-16, 1987, [49]

1980–1983

Europe

Germany

21,985

9

EUROCAT GROUP-17, 1987, [49]

1980–1983

Europe

Italy

135,662

28

Smithells, 1989, [50]

1985–1986

Europe

UK

97,101

67

Corona-Rivera-1, 2021, [51]

1991–2002

Europe

Mexico

95,454

21

Corona-Rivera-2, 2021, [51]

2003–2019

Europe

Mexico

171,795

67

Stone-1, 1988, [52]

1974

Europe

Scotland

14,880

33

Stone-2, 1988, [52]

1975

Europe

Scotland

14,398

39

Stone-3, 1988, [52]

1976

Europe

Scotland

12,889

34

Stone-4, 1988, [52]

1977

Europe

Scotland

12,487

28

Stone-5, 1988, [52]

1978

Europe

Scotland

12,491

30

Stone-6, 1988, [52]

1979

Europe

Scotland

13,339

29

Stone-7, 1988, [52]

1980

Europe

Scotland

13,438

24

Stone-8, 1988, [52]

1981

Europe

Scotland

13,491

19

Stone-9, 1988, [52]

1982

Europe

Scotland

12,884

19

Stone-10, 1988, [52]

1983

Europe

Scotland

12,661

19

Stone-11, 1988, [52]

1984

Europe

Scotland

12,783

14

Stone-12, 1988, [52]

1985

Europe

Scotland

13,089

15

CARSTAIRS-1, 1984, [53]

1971

Europe

Scotland

87,883

224

CARSTAIRS-2, 1984, [53]

1972

Europe

Scotland

79,603

185

CARSTAIRS-3, 1984, [53]

1973

Europe

Scotland

75,265

181

CARSTAIRS-4, 1984, [53]

1974

Europe

Scotland

70,943

156

CARSTAIRS-5, 1984, [53]

1975

Europe

Scotland

68,708

140

CARSTAIRS-6, 1984, [53]

1976

Europe

Scotland

65,524

89

CARSTAIRS-7, 1984, [53]

1977

Europe

Scotland

62,895

66

CARSTAIRS-8, 1984, [53]

1978

Europe

Scotland

64,819

57

CARSTAIRS-9, 1984, [53]

1979

Europe

Scotland

68,841

47

CARSTAIRS-10, 1984, [53]

1980

Europe

Scotland

69,355

32

CARSTAIRS-11, 1984, [53]

1981

Europe

Scotland

69,490

19

CARSTAIRS-12, 1984, [53]

1982

Europe

Scotland

66,582

13

Rankin-1, 2000, [54]

1984

Europe

UK

39,357

27

Rankin-2, 2000, [54]

1985

Europe

UK

41,175

33

Rankin-3, 2000, [54]

1986

Europe

UK

40,541

27

Rankin-4, 2000, [54]

1987

Europe

UK

40,700

35

Rankin-5, 2000, [54]

1988

Europe

UK

40,428

33

Rankin-6, 2000, [54]

1989

Europe

UK

39,411

36

Rankin-7, 2000, [54]

1990

Europe

UK

40,966

30

Rankin-8, 2000, [54]

1991

Europe

UK

41,484

26

Rankin-9, 2000, [54]

1992

Europe

UK

40,316

41

Rankin-10, 2000, [54]

1993

Europe

UK

38,960

26

Rankin-11, 2000, [54]

1994

Europe

UK

35,380

21

Rankin-12, 2000, [54]

1995

Europe

UK

34,487

32

Rankin-13, 2000, [54]

1996

Europe

UK

34,024

21

Fleurke-Rozema, 2015, [55]

2008–2013

Europe

Netherlands

203,703

110

Sever-1, 1982, [56]

1966

America

USA

124,467

66

Sever-2, 1982, [56]

1967

America

USA

124,441

55

Sever-3, 1982, [56]

1968

America

USA

126,637

61

Sever-4, 1982, [56]

1969

America

USA

131,343

82

Sever-5, 1982, [56]

1970

America

USA

134,045

65

Sever-6, 1982, [56]

1971

America

USA

117,324

59

Sever-7, 1982, [56]

1972

America

USA

107,094

60

Limb-1, 1994, [57]

1972–1974

America

USA

18,155

17

Limb-2, 1994, [57]

1979–1981

America

USA

21,436

10

Limb-3, 1994, [57]

1982–1984

America

USA

25,218

11

Limb-4, 1994, [57]

1985–1987

America

USA

30,217

16

Limb-5, 1994, [57]

1988–1990

America

USA

31,290

20

Groisman-1, 2019, [58]

2016

America

Argentina

305,452

57

Rowland, 2006, [59]

1968–2002

America

USA

1,164,865

431

Krajewski, 2021, [60]

2007–2010

America

USA

1,610,709

433

Bronberg, 2020, [61]

2010–2016

America

Argentina

228,208

111

Carmichael, 2004, [62]

1989–1997

America

USA

2,234,846

535

Shaw, 2002, [63]

1985–1997

America

USA

1,303,306

197

Estevez-Ordonez, 2017, [64]

2010–2015

America

Honduras

123,903

30

Biggar-1, 1976, [65]

1918

America

USA

7199

3

Biggar-2, 1976, [65]

1919

America

USA

6973

1

Biggar-3, 1976, [65]

1920

America

USA

7153

10

Biggar-4, 1976, [65]

1921

America

USA

7272

4

Biggar-5, 1976, [65]

1922

America

USA

6905

3

Biggar-6, 1976, [65]

1923

America

USA

7256

7

Biggar-7, 1976, [65]

1924

America

USA

5967

3

Biggar-8, 1976, [65]

1925

America

USA

6925

2

Biggar-9, 1976, [65]

1926

America

USA

6393

3

Biggar-10, 1976, [65]

1927

America

USA

6717

8

Biggar-11, 1976, [65]

1928

America

USA

6370

5

Biggar-12, 1976, [65]

1929

America

USA

6116

7

Biggar-13, 1976, [65]

1930

America

USA

5872

2

Biggar-14, 1976, [65]

1931

America

USA

5632

8

Biggar-15, 1976, [65]

1932

America

USA

5574

6

Biggar-16, 1976, [65]

1933

America

USA

5065

7

Biggar-17, 1976, [65]

1934

America

USA

5127

10

Biggar-18, 1976, [65]

1935

America

USA

5101

6

Biggar-19, 1976, [65]

1936

America

USA

5056

8

Biggar-20, 1976, [65]

1937

America

USA

5314

8

Biggar-21, 1976, [65]

1938

America

USA

5613

7

Sargiotto, 2015, [66]

2009–2013

America

Argentina

703,325

212

Pacheco, 2009, [67]

2000–2006

America

Brasil

161,341

34

Janerich-1, 1973, [68]

1945–1947

America

USA

407,326

463

Janerich-2, 1973, [68]

1948–1950

America

USA

454,206

476

Janerich-3, 1973, [68]

1951–1953

America

USA

510,601

397

Janerich-4, 1973, [68]

1954–1956

America

USA

565.391

398

Janerich-5, 1973, [68]

1957–1959

America

USA

601,196

375

Janerich-6, 1973, [68]

1960–1962

America

USA

605,336

392

Janerich-7, 1973, [68]

1963–1965

America

USA

574,662

376

Janerich-8, 1973, [68]

1966–1968

America

USA

506,706

337

Janerich-9, 1973, [68]

1969–1971

America

USA

499,131

248

Jorde, 1984, [69]

1940–1979

America

USA

979,873

374

Castilla-1, 1985, [29]

1967

America

South America

12,430

7

Castilla-2, 1985, [29]

1968

America

South American

33,874

8

Castilla-3, 1985, [29]

1969

America

South American

42,874

7

Castilla-4, 1985, [29]

1970

America

South American

51,535

11

Castilla-5, 1985, [29]

1971

America

South American

47,156

9

Castilla-6, 1985, [29]

1972

America

South American

50,786

13

Castilla-7, 1985, [29]

1973

America

South American

65,009

13

Castilla-8, 1985, [29]

1974

America

South American

84,961

31

Castilla-9, 1985, [29]

1975

America

South American

65,214

11

Castilla-10, 1985, [29]

1976

America

South American

77,992

22

Castilla-11, 1985, [29]

1977

America

South American

67,432

19

Castilla-12, 1985, [29]

1978

America

South American

72,231

21

Castilla-13, 1985, [29]

1979

America

South American

68,645

20

Castilla-14, 1985, [29]

1980–1982

America

Argentina

70,768

38

Castilla-15, 1985, [29]

1980–1982

America

Bolivia

8,514

5

Castilla-16, 1985, [29]

1980–1982

America

Brazil

43,702

26

Castilla-17, 1985, [29]

1980–1982

America

Colombia

1,623

0

Castilla-18, 1985, [29]

1980–1982

America

Chile

25,634

23

Castilla-19, 1985, [29]

1980–1982

America

Ecuador

19,463

10

Castilla-20, 1985, [29]

1980–1982

America

Paraguay

3,443

2

Castilla-21, 1985, [29]

1980–1982

America

Peru

15,943

4

Castilla-22, 1985, [29]

1980–1982

America

Uruguay

10,916

11

Castilla-23, 1985, [29]

1980–1982

America

Venezuela

55,828

35

Groisman-2, 2017, [70]

2009–2013

America

Argentina

703,422

212

Forrester-1, 1998, [71]

1987–1996

America

USA

150,000

75

Parks, 2011, [72]

1999—2005

America

USA

2,594,295

677

Cragan-1, 2009, [73]

1995–2004

America

USA

470,802

81

Besser, 2007, [74]

1968–2003

America

USA

398,165

434

de Souza, 2020, [75]

2012–2017

America

Brazil

30,761

9

James, 1993, [30]

1970–1987

America

USA

15,487,449

6040

Parker-1, 2010, [76]

2004–2006

America

USA

3,120,605.00

697

Parker-2, 2010, [76]

2004–2006

America

USA

2,075,973

211

Parker 3, 2010, [76]

2004–2006

America

USA

2,145,287

192

Feuchtbaum, 1999, [77]

1990–1994

America

USA

1,618,279

770

Windham-1, 1982, [78]

1966–1972

America

USA

865,351

447

Aguiar, 2003, [79]

1999–2000

America

Latin-America

18,807

24

Poletta, 2018, [80]

1990–2013

America

Venezuela

353,956

155

Castilla-24, 2003, [81]

1999

America

Chile

10,740

10

Castilla-25, 2003, [81]

2000

America

Chile

12,977

5

Castilla-26, 2003, [81]

2001

America

Chile

11,462

7

Forrester-2, 2000, [82]

1986–1997

America

USA

246,189

89

Winsor, 1986, [83]

1980–1984

America

Canada

61,500

43

Bidondo, 2015, [84]

2009–2013

America

Argentina

703 325

164

De Wals, 2007, [85]

1993–2002

America

Canada

1,909,741

830

Yang, 2004, [86]

1989–2000

America

USA

2,615,197

617

Boulet-1, 2011, [87]

1995–2005

America

USA

522,315

29

McBride, 1979, [88]

1952–1970

America

Columbia

686,326

466

Siffel, 2005, [89]

1978–2001

America

USA

874,100

243

Mathews-1, 2002, [90]

1991

America

USA

3,564,453

655

Mathews-2, 2002, [90]

1992

America

USA

3,572,890

457

Mathews-3, 2002, [90]

1993

America

USA

3,562,723

481

Mathews-4, 2002, [90]

1994

America

USA

3,527,482

387

Mathews-5, 2002, [90]

1995

America

USA

3,484,539

408

Mathews-6, 2002, [90]

1996

America

USA

3,478,723

416

Mathews-7, 2002, [90]

1997

America

USA

3,469,667

434

Mathews-8, 2002, [90]

1998

America

USA

3,519,240

349

Mathews-9, 2002, [90]

1999

America

USA

3,533,565

382

Mathews-10, 2002, [90]

2000

America

USA

3,640,376

376

Mathews-11, 2002, [90]

2001

America

USA

3,649,061

343

Cragan-2, 1995, [91]

1985–1994

America

USA

211,024

268

Canfield, 2009, [92]

1999–2003

America

USA

1,827,317

514

Feldman, 1982, [93]

1968–1976

America

USA

173,655

89

Naggan-1, 1969, [94]

1930–1933

America

USA

14,052

38

Naggan-2, 1969, [94]

1934–1937

America

USA

16,179

28

Naggan-3, 1969, [94]

1938–1941

America

USA

18,206

34

Naggan-4, 1969, [94]

1942–1945

America

USA

22,059

25

Naggan-5, 1969, [94]

1946–1949

America

USA

28,097

25

Naggan-6, 1969, [94]

1950–1953

America

USA

43,441

37

Naggan-7, 1969, [94]

1954–1957

America

USA

52,032

32

Naggan-8, 1969, [94]

1958–1961

America

USA

57,639.00

35

Naggan-9, 1969, [94]

1962–1965

America

USA

60,002

51

Windham-2, 1982, [95]

1966–1979

America

USA & Norway

1,656,116

802

Boulet-2, 2008, [96]

1999–2000

America

USA

3,165,992

782

Boulet-3, 2008, [96]

2001–2002

America

USA

3,218,605

692

Boulet-4, 2008, [96]

2003–2004

America

USA

3,242,424

642

Bupp, 2015, [97]

1992–2012

America

USA

1,116,289

240

Nasri, 2014, [98]

1991–2011

Africa

Tunisia

3,803,889

174

Berihu, 2018, [99]

2018

Africa

Ethiopia

14,903

99

Forci, 2020, [100]

2011–2016

Africa

Morocco

43,923

22

Buccimazza, 1994, [101]

1973–1992

Africa

South Africa

516,252

164

Omer, 2016, [102]

2014–2015

Africa

Sudan

36,785

18

Riley, 1998, [103]

1983–1995

Australia

Australia

825,051

452

Owen, 2000, [104]

1983–1997

Australia

Australia

949,914

550

Chan-1, 1993, [105]

1966

Australia

Australia

20,556

24

Chan-2, 1993, [105]

1967

Australia

Australia

20,597

8

Chan-3, 1993, [105]

1968

Australia

Australia

21,424

27

Chan-4, 1993, [105]

1969

Australia

Australia

22,185

25

Chan-5, 1993, [105]

1970

Australia

Australia

22,817

13

Chan-6, 1993, [105]

1971

Australia

Australia

23,246

27

Chan-7, 1993, [105]

1972

Australia

Australia

22,073

25

Chan-8, 1993, [105]

1973

Australia

Australia

20,651

22

Chan-9, 1993, [105]

1974

Australia

Australia

20,417

22

Chan-10, 1993, [105]

1975

Australia

Australia

20,175

17

Chan-11, 1993, [105]

1976

Australia

Australia

19,157

15

Chan-12, 1993, [105]

1977

Australia

Australia

19,438

15

Chan-13, 1993, [105]

1978

Australia

Australia

18,736

17

Chan-14, 1993, [105]

1979

Australia

Australia

18,641

19

Chan-15, 1993, [105]

1980

Australia

Australia

18,638

20

Chan-16, 1993, [105]

1981

Australia

Australia

19,052

12

Chan-17, 1993, [105]

1982

Australia

Australia

19,128

19

Chan-18, 1993, [105]

1983

Australia

Australia

19,800

15

Chan-19, 1993, [105]

1984

Australia

Australia

20,281

17

Chan-20, 1993, [105]

1985

Australia

Australia

19,833

14

Chan-21, 1993, [105]

1986

Australia

Australia

19,800

16

Chan-22, 1993, [105]

1987

Australia

Australia

19,395

16

Chan-23, 1993, [105]

1988

Australia

Australia

19,530

14

Chan-24, 1993, [105]

1989

Australia

Australia

19,823

17

Chan-25, 1993, [105]

1990

Australia

Australia

19,988

23

Chan-26, 1993, [105]

1991

Australia

Australia

19,749

20

Barry Borman, 1986, [106]

1978

Australia

New Zealand

52,143

51

BORMAN, 1993, [107]

1978–1982

Australia

New Zealand

262,821

205