| Value | Category | Cases | |
|---|---|---|---|
| 1 | Never | 1628 |
58.6%
|
| 2 | Once or twice a year | 567 |
20.4%
|
| 3 | More than 7 times | 303 |
10.9%
|
| 4 | Monthly | 183 |
6.6%
|
| 5 | More often than monthly | 95 |
3.4%
|
| Sysmiss | 23 |