| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 12 months ago | 1013 |
39.6%
|
| 2 | 12-23 months ago | 480 |
18.8%
|
| 3 | 2 or more years ago | 1062 |
41.6%
|
| Sysmiss | 4328 |