Table 1.
Sample size, crude and corrected response rates of initial sample (16–64-year-olds) and study sample (25–64-year-olds) by study year, 1996–2014
| Year | Sample size | Initial survey sample | Study subsample | ||
|---|---|---|---|---|---|
| Response rate | Response rate | ||||
| Crude | Corrected | Crude | Corrected | ||
| 1996 | 2000 | 75.4 | - | - | - |
| 1998 | 2000 | 66.1 | - | - | - |
| 2000 | 2000 | 68.8 | - | - | - |
| 2002 | 2000 | 66.9 | - | - | - |
| 2004 | 5000 | 61.5 | 63.4 | 62.3 | 64.0 |
| 2006 | 5000 | 57.3 | 59.2 | 58.3 | 60.1 |
| 2008 | 5000 | 60.1 | 62.2 | 60.4 | 62.6 |
| 2010 | 5000 | 60.5 | 62.3 | 61.6 | 63.6 |
| 2012 | 5000 | 59.4 | 62.0 | 60.6 | 63.4 |
| 2014 | 5000 | 51.5 | 53.3 | 53.2 | 55.1 |