| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 12 months ago | 85 |
2.8%
|
| 2 | 12-23 months ago | 179 |
6%
|
| 3 | 2 or more years ago | 47 |
1.6%
|
| Sysmiss | 2677 |
89.6%
|