| Value | Category | Cases | |
|---|---|---|---|
| 1 | Once a year | 229 |
15.4%
|
| 2 | Once a term | 290 |
19.6%
|
| 3 | Once a month | 328 |
22.1%
|
| 4 | Once a week | 550 |
37.1%
|
| 97 | Other | 86 |
5.8%
|
| Sysmiss | 3739 |