| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1. daily | 20 |
0.5%
|
| 2 | 2. weekly | 268 |
6.1%
|
| 3 | 3. monthly | 1968 |
45%
|
| 4 | 4. once a term | 1923 |
43.9%
|
| 5 | 5. never | 199 |
4.5%
|
| Sysmiss | 160 |