| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 371 |
1.5%
|
| 2 | Monthly | 978 |
3.9%
|
| 3 | Yearly | 1522 |
6.1%
|
| 4 | Less often | 2505 |
10.1%
|
| 5 | Not at all | 19391 |
78.3%
|
| Sysmiss | 817 |