| Value | Category | Cases | |
|---|---|---|---|
| 1 | DAILY | 1 |
0.2%
|
| 2 | LESS THAN DAILY | 2 |
0.3%
|
| 3 | NOT AT ALL | 606 |
99.5%
|
| 9 | REFUSED | 0 |
0%
|
| Sysmiss | 3738 |