| Value | Category | Cases | |
|---|---|---|---|
| 1 | every month | 125 |
2.4%
|
| 2 | no months | 3674 |
69.8%
|
| 3 | number of months | 718 |
13.7%
|
| 8 | don't know | 735 |
14%
|
| 9 | refused | 8 |
0.2%
|