| Value | Category | Cases | |
|---|---|---|---|
| 1 | I have never used drugs | 3321 |
81.6%
|
| 2 | 7 years old or younger | 145 |
3.6%
|
| 3 | 8 or 9 years old | 59 |
1.5%
|
| 4 | 10 or 11 years old | 62 |
1.5%
|
| 5 | 12 or 13 years old | 97 |
2.4%
|
| 6 | 14 or 15 years old | 180 |
4.4%
|
| 7 | 16 or 17 years old | 129 |
3.2%
|
| 8 | 18 years old or older | 75 |
1.8%
|
| Sysmiss | 463 |