Table 1.
Sample sizes from 1991 to 2001/2002
| Wave | Year of assessment | Grade | Average age | Sample size |
|---|---|---|---|---|
| 1 (t1) | 1991 | 7 | 13 | 3828 |
| 4 (t2) | 1995 | 10 | 17 | 1257 |
| 5 (t3) | 1997 | 12/Vocational training | 19 | 1167 |
| 6 (t4) | 2001/2002 | Career/university entry | 24 | 732 |
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