| Value | Category | Cases | |
|---|---|---|---|
| 1 | Daily | 2268 |
10.5%
|
| 2 | Weekly | 2154 |
9.9%
|
| 3 | Monthly | 1528 |
7%
|
| 4 | Yearly | 228 |
1.1%
|
| 5 | Not at all | 15499 |
71.5%
|
| Sysmiss | 3431 |