| Value | Category | Cases | |
|---|---|---|---|
| 1 | I have never used drugs | 1046 |
88.2%
|
| 2 | 7 years old or younger | 14 |
1.2%
|
| 3 | 8 or 9 years old | 9 |
0.8%
|
| 4 | 10 or 11 years old | 7 |
0.6%
|
| 5 | 12 or 13 years old | 41 |
3.5%
|
| 6 | 14 or 15 years old | 50 |
4.2%
|
| 7 | 16 years old or older | 19 |
1.6%
|
| Sysmiss | 24 |