| Value | Category | Cases | |
|---|---|---|---|
| 1 | Daily | 2110 |
9.7%
|
| 2 | Weekly | 5563 |
25.7%
|
| 3 | Monthly | 4609 |
21.3%
|
| 4 | Yearly | 414 |
1.9%
|
| 5 | Not at all | 8981 |
41.4%
|
| Sysmiss | 3431 |