| Value | Category | Cases | |
|---|---|---|---|
| 1 | I have never used drugs | 592 |
75.9%
|
| 2 | 7 years old or younger | 19 |
2.4%
|
| 3 | 8 or 9 years old | 18 |
2.3%
|
| 4 | 10 or 11 years old | 13 |
1.7%
|
| 5 | 12 or 13 years old | 48 |
6.2%
|
| 6 | 14 or 15 years old | 75 |
9.6%
|
| 7 | 16 years old or older | 15 |
1.9%
|
| Sysmiss | 43 |