| Value | Category | Cases | |
|---|---|---|---|
| 1 | Daily | 569 |
2.7%
|
| 2 | Weekly | 2658 |
12.5%
|
| 3 | Monthly | 3671 |
17.3%
|
| 4 | Yearly | 962 |
4.5%
|
| 5 | Not at all | 13326 |
62.9%
|
| Sysmiss | 3974 |