| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 0 | Never | 2030 |
84.6%
|
| 1 | Only once | 121 |
5%
|
| 2 | A few times | 150 |
6.3%
|
| 3 | Often | 54 |
2.3%
|
| 9 | Don't know | 45 |
1.9%
|
| 998 | Refused | 0 |
0%
|