| Value | Category | Cases | |
|---|---|---|---|
| 1 | every month | 506 |
10%
|
| 2 | no months | 3483 |
68.6%
|
| 3 | number of months | 662 |
13%
|
| 8 | don't know | 401 |
7.9%
|
| 9 | refused | 27 |
0.5%
|