| Value | Category | Cases | |
|---|---|---|---|
| 1 | Daily | 389 |
1.8%
|
| 2 | Weekly | 966 |
4.6%
|
| 3 | Monthly | 1660 |
7.8%
|
| 4 | Yearly | 496 |
2.3%
|
| 5 | Not at all | 17675 |
83.4%
|
| Sysmiss | 3974 |