| Value | Category | Cases | |
|---|---|---|---|
| 3 | Less than 1 month | 4 |
19%
|
| 4 | 1 month - less than 6 months | 6 |
28.6%
|
| 5 | 6 months - 1 year | 11 |
52.4%
|
| Sysmiss | 978 |