| Value | Category | Cases | |
|---|---|---|---|
| 1 | Never | 1962 |
59.9%
|
| 2 | Once or twice a year | 748 |
22.8%
|
| 3 | Monthly | 308 |
9.4%
|
| 4 | More often than monthly | 260 |
7.9%
|
| Sysmiss | 43 |