| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know | 182 |
1.9%
|
| -8 | Refused | 73 |
0.7%
|
| -5 | Not applicable | 0 |
0%
|
| -3 | Missing | 9 |
0.1%
|
| 1 | Once | 2431 |
24.8%
|
| 2 | More than once | 2669 |
27.2%
|
| 3 | Never | 4448 |
45.3%
|
| Sysmiss | 1481 |