| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 936 |
78%
|
| 1 | Only once | 51 |
4.3%
|
| 2 | A few times | 108 |
9%
|
| 3 | Often | 93 |
7.8%
|
| 9 | Don't know | 12 |
1%
|
| 998 | Refused | 0 |
0%
|