| Value | Category | Cases | |
|---|---|---|---|
| 1 | Daily | 298 |
1.4%
|
| 2 | Weekly | 1054 |
4.9%
|
| 3 | Monthly | 1234 |
5.7%
|
| 4 | Yearly | 242 |
1.1%
|
| 5 | Not at all | 18849 |
87%
|
| Sysmiss | 3431 |