| Value | Category | Cases | |
|---|---|---|---|
| 1 | Days | 161 |
15.4%
|
| 2 | Months | 467 |
44.7%
|
| 3 | Years | 407 |
38.9%
|
| 98 | D/K | 10 |
1%
|
| Sysmiss | 6208 |