| Value | Category | Cases | |
|---|---|---|---|
| 1 | DAILY | 1 |
0.1%
|
| 2 | LESS THAN DAILY | 20 |
2.8%
|
| 3 | NOT AT ALL | 692 |
97.1%
|
| 9 | REFUSED | 0 |
0%
|
| Sysmiss | 3537 |