| Value | Category | Cases | |
|---|---|---|---|
| 1 | Daily | 2 |
0.1%
|
| 2 | Weekly | 3 |
0.1%
|
| 3 | Monthly | 47 |
1.6%
|
| 4 | Never | 2833 |
98.2%
|
| Sysmiss | 1921 |