| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 12 months ago | 2792 |
44.8%
|
| 2 | 12-23 months ago | 1415 |
22.7%
|
| 3 | 2 or more years ago | 2008 |
32.2%
|
| 9 | Missing | 19 |
0.3%
|
| Sysmiss | 27463 |