| Value | Category | Cases | |
|---|---|---|---|
| 1 | DAILY | 1 |
0.1%
|
| 2 | LESS THAN DAILY | 21 |
2.6%
|
| 3 | NOT AT ALL | 799 |
97.2%
|
| 9 | REFUSED | 1 |
0.1%
|
| Sysmiss | 7483 |