| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 936 |
74.1%
|
| 1 | Only once | 113 |
8.9%
|
| 2 | A few times | 140 |
11.1%
|
| 3 | Often | 47 |
3.7%
|
| 9 | Don't know | 28 |
2.2%
|
| 998 | Refused | 0 |
0%
|