| Value | Category | Cases | |
|---|---|---|---|
| 1 | Never | 552 |
27.4%
|
| 2 | Once a year | 82 |
4.1%
|
| 3 | Once a term | 820 |
40.6%
|
| 4 | Once a month | 319 |
15.8%
|
| 5 | Once a week | 166 |
8.2%
|
| 98 | Other | 79 |
3.9%
|
| Sysmiss | 1309 |