| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 1131 |
94.3%
|
| 1 | Only once | 42 |
3.5%
|
| 2 | A few times | 20 |
1.7%
|
| 3 | Often | 4 |
0.3%
|
| 9 | Don't know | 3 |
0.3%
|
| 998 | Refused | 0 |
0%
|