| Value | Category | Cases | |
|---|---|---|---|
| 1 | Months | 3 |
9.4%
|
| 2 | Weeks | 8 |
25%
|
| 3 | Days | 17 |
53.1%
|
| 98 | Don't know | 4 |
12.5%
|
| 99 | Refused | 0 |
0%
|
| Sysmiss | 372 |