| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 8 |
0%
|
| 0 | Never | 23867 |
86.1%
|
| 1 | Only once | 1492 |
5.4%
|
| 2 | A few times | 1495 |
5.4%
|
| 3 | Often | 600 |
2.2%
|
| 9 | Don't know | 251 |
0.9%
|
| 998 | Refused | 0 |
0%
|