| Value | Category | Cases | |
|---|---|---|---|
| 0 | 0. never | 1310 |
91.7%
|
| 1 | 1. once a day | 37 |
2.6%
|
| 2 | 2. 2 or more times a day | 49 |
3.4%
|
| 3 | 3. once a week | 18 |
1.3%
|
| 4 | 4. once a month | 15 |
1%
|
| Sysmiss | 134 |