| Value | Category | Cases | |
|---|---|---|---|
| 1 | Daily | 1900 |
8.8%
|
| 2 | Weekly | 2858 |
13.2%
|
| 3 | Monthly | 1455 |
6.7%
|
| 4 | Yearly | 317 |
1.5%
|
| 5 | Not at all | 15147 |
69.9%
|
| Sysmiss | 3431 |