| Value | Category | Cases | |
|---|---|---|---|
| 1 | Daily | 281 |
1.3%
|
| 2 | Weekly | 395 |
1.8%
|
| 3 | Monthly | 262 |
1.2%
|
| 4 | Yearly | 66 |
0.3%
|
| 5 | Not at all | 20673 |
95.4%
|
| Sysmiss | 3431 |