| Value | Category | Cases | |
|---|---|---|---|
| 1 | every month | 34 |
0.7%
|
| 2 | no months | 3504 |
69%
|
| 3 | number of months | 951 |
18.7%
|
| 8 | don't know | 582 |
11.5%
|
| 9 | refused | 8 |
0.2%
|