| Household survey | Adolescent surveys | ||
---|---|---|---|---|
Wave 1 2005–2006 | Wave 1 2005–2006 ages 13–17 | Wave 2 2006–2007 ages 14–18 | Wave 3 2009–2010 ages 17–21 | |
Respondents | 99.9% | 98.9% | 91.8% | 72.7% |
Nonrespondents | Â | 0.1% | 6.2% | 25.4% |
Refusals | 0.1% | 1.0% | 2.0% | 1.9% |
Total | 100.0% | 100.0% | 100.0% | 100.0% |
Effective sample size | 3700 | 2107 | 2104 | 2102 |