| Value | Category | Cases | |
|---|---|---|---|
| 1 | Never | 3275 |
56.6%
|
| 2 | Once or twice a year | 1474 |
25.5%
|
| 3 | Monthly | 547 |
9.5%
|
| 4 | More often than monthly | 491 |
8.5%
|
| Sysmiss | 56 |