| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 0 | No | 9251 |
89.3%
|
| 1 | Yes, took no drug | 1094 |
10.6%
|
| 8 | Don't know | 8 |
0.1%
|
| 9 | 11 |
0.1%
|
|
| Sysmiss | 4680 |