| Value | Category | Cases | |
|---|---|---|---|
| 1 | DAILY | 14 |
0.5%
|
| 2 | LESS THAN DAILY | 54 |
1.8%
|
| 3 | NOT AT ALL | 3005 |
97.8%
|
| 9 | REFUSED | 1 |
0%
|
| Sysmiss | 8570 |