| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 941 |
74.4%
|
| 1 | Only once | 53 |
4.2%
|
| 2 | A few times | 140 |
11.1%
|
| 3 | Often | 106 |
8.4%
|
| 9 | Don't know | 24 |
1.9%
|
| 998 | Refused | 0 |
0%
|