| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 1 |
0.1%
|
| 0 | Never | 1092 |
91%
|
| 1 | Only once | 20 |
1.7%
|
| 2 | A few times | 45 |
3.8%
|
| 3 | Often | 27 |
2.3%
|
| 9 | Don't know | 15 |
1.3%
|
| 998 | Refused | 0 |
0%
|