| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 999 |
83.3%
|
| 1 | Only once | 87 |
7.3%
|
| 2 | A few times | 92 |
7.7%
|
| 3 | Often | 20 |
1.7%
|
| 9 | Don't know | 2 |
0.2%
|
| 998 | Refused | 0 |
0%
|