| Value | Category | Cases | |
|---|---|---|---|
| 1 | Never | 1484 |
20.6%
|
| 2 | Once or twice | 2492 |
34.5%
|
| 3 | More often | 3243 |
44.9%
|
| 9 | 63 | ||
| Sysmiss | 15252 |