| Value | Category | Cases | |
|---|---|---|---|
| 0 | 0. never | 260 |
5.8%
|
| 1 | 1. once a year | 100 |
2.2%
|
| 2 | 2. once a semester | 280 |
6.2%
|
| 3 | 3. once a term | 1989 |
44.2%
|
| 4 | 4. once a month | 1259 |
28%
|
| 5 | 5. once a week | 469 |
10.4%
|
| 77 | 77. d/r | 0 |
0%
|
| 99 | 99. missing | 141 |
3.1%
|
| Sysmiss | 40 |