| Value | Category | Cases | |
|---|---|---|---|
| 1 | Daily | 357 |
1.7%
|
| 2 | Weekly | 1222 |
5.8%
|
| 3 | Monthly | 2034 |
9.6%
|
| 4 | Yearly | 870 |
4.1%
|
| 5 | Not at all | 16703 |
78.8%
|
| Sysmiss | 3974 |