The numbers, response rates and composition of the 11 waves of the survey
| Sample (n) | Respondents (n) | Response rate (%) | Hospital seniors (n) | Hospital juniors (n) | Other doctors (n) | |
|---|---|---|---|---|---|---|
| 1994 | 1272 | 1209 | 95.0 | 371 | 179 | 659 |
| 1995 | 1258 | 1145 | 91.0 | 372 | 166 | 607 |
| 1996 | 1287 | 965 | 75.0 | 374 | 130 | 461 |
| 1997 | 1260 | 951 | 75.5 | 322 | 86 | 543 |
| 2000* | 1606 | 1321 | 82.3 | 389 | 226 | 706 |
| 2002 | 1608 | 1174 | 73.0 | 205 | 104 | 865 |
| 2004 | 1499 | 1004 | 67.0 | 194 | 91 | 719 |
| 2006 | 1400 | 966 | 69.0 | 375 | 71 | 520 |
| 2008* | 1649 | 1072 | 65.0 | 405 | 176 | 491 |
| 2010 | 1520 | 1014 | 66.7 | 415 | 116 | 483 |
| 2012* | 1792 | 1279 | 71.4 | 436 | 246 | 597 |
*Young doctors added to the cohort.