| Value | Category | Cases | |
|---|---|---|---|
| 1 | Years | 4 |
23.5%
|
| 2 | Months | 10 |
58.8%
|
| 3 | Weeks | 1 |
5.9%
|
| 7 | Not Applicable | 2 |
11.8%
|
| Sysmiss | 924 |