| Value | Category | Cases | |
|---|---|---|---|
| 1 | DAILY | 23 |
0.2%
|
| 2 | LESS THAN DAILY | 473 |
4.2%
|
| 3 | NOT AT ALL | 10696 |
95.4%
|
| 9 | REFUSED | 14 |
0.1%
|
| Sysmiss | 252 |