| Value | Category | Cases | |
|---|---|---|---|
| 0 | 0. never | 1379 |
96.5%
|
| 1 | 1. once a day | 10 |
0.7%
|
| 2 | 2. 2 or more times a day | 8 |
0.6%
|
| 3 | 3. once a week | 10 |
0.7%
|
| 4 | 4. once a month | 22 |
1.5%
|
| Sysmiss | 134 |