| Value | Category | Cases | |
|---|---|---|---|
| 1 | I have never used drugs | 1685 |
88.3%
|
| 2 | 7 years old or younger | 18 |
0.9%
|
| 3 | 8 or 9 years old | 14 |
0.7%
|
| 4 | 10 or 11 years old | 23 |
1.2%
|
| 5 | 12 or 13 years old | 71 |
3.7%
|
| 6 | 14 or 15 years old | 80 |
4.2%
|
| 7 | 16 years old or older | 17 |
0.9%
|
| Sysmiss | 7 |