| Value | Category | Cases | |
|---|---|---|---|
| 1 | Daily | 1959 |
9.2%
|
| 2 | Weekly | 2657 |
12.5%
|
| 3 | Monthly | 1284 |
6.1%
|
| 4 | Yearly | 289 |
1.4%
|
| 5 | Not at all | 14997 |
70.8%
|
| Sysmiss | 3974 |