| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know | 117 |
0.9%
|
| -8 | Refused | 0 |
0%
|
| -5 | Not applicable | 0 |
0%
|
| -3 | Missing | 9 |
0.1%
|
| 1 | Once | 3656 |
26.8%
|
| 2 | More than once | 4756 |
34.9%
|
| 3 | Never | 5081 |
37.3%
|
| Sysmiss | 1374 |