| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 717 |
2.9%
|
| 2 | Monthly | 1941 |
7.8%
|
| 3 | Yearly | 4977 |
20.1%
|
| 4 | Less often | 5141 |
20.8%
|
| 5 | Not at all | 11991 |
48.4%
|
| Sysmiss | 817 |