| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 12 months ago | 173 |
5.8%
|
| 2 | 12-23 months ago | 183 |
6.1%
|
| 3 | 2 or more years ago | 1062 |
35.5%
|
| 9 | Missing | 2 |
0.1%
|
| Sysmiss | 1568 |
52.5%
|