| Value | Category | Cases | |
|---|---|---|---|
| 1 | Daily | 119 |
0.6%
|
| 2 | Weekly | 258 |
1.2%
|
| 3 | Monthly | 408 |
1.9%
|
| 4 | Yearly | 159 |
0.8%
|
| 5 | Not at all | 20242 |
95.5%
|
| Sysmiss | 3974 |