| Value | Category | Cases | |
|---|---|---|---|
| 1 | I have never used drugs | 880 |
88.3%
|
| 2 | 7 years old or younger | 54 |
5.4%
|
| 3 | 8 or 9 years old | 16 |
1.6%
|
| 4 | 10 or 11 years old | 7 |
0.7%
|
| 5 | 12 or 13 years old | 12 |
1.2%
|
| 6 | 14 or 15 years old | 19 |
1.9%
|
| 7 | 16 or 17 years old | 7 |
0.7%
|
| 8 | 18 years old or older | 2 |
0.2%
|
| Sysmiss | 31 |