| Value | Category | Cases | |
|---|---|---|---|
| 1 | Daily | 2151 |
9.9%
|
| 2 | Weekly | 2845 |
13.1%
|
| 3 | Monthly | 1108 |
5.1%
|
| 4 | Yearly | 145 |
0.7%
|
| 5 | Not at all | 15428 |
71.2%
|
| Sysmiss | 3431 |