| Value | Category | Cases | |
|---|---|---|---|
| 1 | Never | 149 |
14.4%
|
| 2 | Once a year or less | 70 |
6.8%
|
| 3 | Every half a year | 125 |
12.1%
|
| 4 | Once every 3 months | 216 |
20.8%
|
| 5 | Every month | 405 |
39.1%
|
| 9 | Don’t know | 71 |
6.9%
|