| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 12 months ago | 209 |
7.3%
|
| 2 | 12-23 months ago | 283 |
9.9%
|
| 3 | 2 or more years ago | 822 |
28.7%
|
| Sysmiss | 1552 |
54.2%
|