| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 353 |
1.4%
|
| 2 | Monthly | 2393 |
9.7%
|
| 3 | Yearly | 1196 |
4.8%
|
| 4 | Less often | 3342 |
13.5%
|
| 5 | Not at all | 17483 |
70.6%
|
| Sysmiss | 817 |