| Value | Category | Cases | |
|---|---|---|---|
| 1 | DAILY | 8 |
0.2%
|
| 2 | LESS THAN DAILY | 52 |
1.5%
|
| 3 | NOT AT ALL | 3490 |
98.3%
|
| 9 | REFUSED | 2 |
0.1%
|
| Sysmiss | 11112 |