| Value | Category | Cases | |
|---|---|---|---|
| 1 | Daily | 1915 |
9%
|
| 2 | Weekly | 5396 |
25.5%
|
| 3 | Monthly | 4595 |
21.7%
|
| 4 | Yearly | 504 |
2.4%
|
| 5 | Not at all | 8776 |
41.4%
|
| Sysmiss | 3974 |