| Value | Category | Cases | |
|---|---|---|---|
| 1 | More than 1 year ago | 1117 |
43.2%
|
| 2 | More than 6 months, but less than 1 year ago | 307 |
11.9%
|
| 3 | More than 3 months, but less than 6 months ago | 372 |
14.4%
|
| 4 | Less than 3 months ago | 787 |
30.5%
|
| Sysmiss | 112 |