| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weeks | 161 |
46.1%
|
| 2 | Months | 175 |
50.1%
|
| 98 | Don't know | 13 |
3.7%
|
| 99 | Refused | 0 |
0%
|
| Sysmiss | 55 |