| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes, daily | 3 |
0.3%
|
| 2 | yes, not daily | 4 |
0.4%
|
| 3 | not at all | 1100 |
99.4%
|
| 8 | dk | 0 |
0%
|
| 9 | na | 0 |
0%
|
| Sysmiss | 3558 |