| Value | Category | Cases | |
|---|---|---|---|
| 0 | 0. never | 1411 |
98.7%
|
| 1 | 1. once a day | 4 |
0.3%
|
| 2 | 2. 2 or more times a day | 12 |
0.8%
|
| 3 | 3. once a week | 1 |
0.1%
|
| 4 | 4. once a month | 1 |
0.1%
|
| Sysmiss | 134 |