| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1. never | 562 |
17.8%
|
| 2 | 2. once or twice a year | 56 |
1.8%
|
| 3 | 3. about once a term | 160 |
5.1%
|
| 4 | 4. about once a month | 214 |
6.8%
|
| 5 | 5. about once a week | 1274 |
40.4%
|
| 6 | 6. nearly every day | 884 |
28.1%
|
| Sysmiss | 1388 |