| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 94 |
0.4%
|
| 2 | Monthly | 481 |
1.9%
|
| 3 | Yearly | 1645 |
6.6%
|
| 4 | Less often | 2308 |
9.3%
|
| 5 | Not at all | 20239 |
81.7%
|
| Sysmiss | 817 |