| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 12 monts ago | 1128 |
39.2%
|
| 2 | 12-23 months ago | 393 |
13.6%
|
| 3 | 2 or more years ago | 1347 |
46.8%
|
| 9 | Missing | 13 |
0.5%
|
| Sysmiss | 6718 |