| Value | Category | Cases | |
|---|---|---|---|
| 1 | Years | 2 |
50%
|
| 2 | Months | 2 |
50%
|
| 3 | Weeks | 0 |
0%
|
| 4 | Days | 0 |
0%
|
| Sysmiss | Don't know | 0 | |
| Sysmiss | Not applicable | 0 | |
| Sysmiss | Others | 0 | |
| Sysmiss | Can't reveal | 0 | |
| Sysmiss | 4199 |