| Value | Category | Cases | |
|---|---|---|---|
| 1 | never | 40 |
2.5%
|
| 2 | once a year or less frequent | 209 |
13.2%
|
| 3 | two or three times a year | 580 |
36.7%
|
| 4 | monthly or more often | 752 |
47.6%
|
| Sysmiss | 1558 |