| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 12 months ago | 2784 |
64.1%
|
| 2 | 12-23 months ago | 1135 |
26.1%
|
| 3 | 24-35 months ago | 233 |
5.4%
|
| 4 | 3 or more years ago | 190 |
4.4%
|
| Sysmiss | 9115 |