| Value | Category | Cases | |
|---|---|---|---|
| 1 | Days | 0 |
0%
|
| 2 | Weeks | 1 |
4%
|
| 3 | Months | 14 |
56%
|
| 4 | Years | 9 |
36%
|
| 9 | Dont know | 1 |
4%
|
| Sysmiss | 4178 |