| Value | Category | Cases | |
|---|---|---|---|
| 1 | Never | 1408 |
49.6%
|
| 2 | Once or twice a year | 872 |
30.7%
|
| 3 | Monthly | 263 |
9.3%
|
| 4 | More often than monthly | 293 |
10.3%
|
| Sysmiss | 14 |