| Value | Category | Cases | |
|---|---|---|---|
| 0 | No | 1542 |
43.7%
|
| 1 | Yes, took no drug | 1960 |
55.6%
|
| 8 | Don't know | 25 |
0.7%
|
| 9 | 41 | ||
| Sysmiss | 14853 |