| Value | Category | Cases | |
|---|---|---|---|
| 0 | 0. never | 1343 |
95.8%
|
| 1 | 1. once a day | 20 |
1.4%
|
| 2 | 2. 2 or more times a day | 12 |
0.9%
|
| 3 | 3. once a week | 8 |
0.6%
|
| 4 | 4. once a month | 19 |
1.4%
|
| Sysmiss | 161 |