| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 1 month | 636 |
44.9%
|
| 2 | 1–3 months | 453 |
31.9%
|
| 3 | 4–6 months | 190 |
13.4%
|
| 4 | 7–12 months | 73 |
5.1%
|
| 5 | More than 12 months | 66 |
4.7%
|
| Sysmiss | 59471 |