| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 12 months ago | 432 |
1.9%
|
| 2 | 12-23 months ago | 808 |
3.6%
|
| 3 | 2 or more years ago | 187 |
0.8%
|
| Sysmiss | 20829 |
93.6%
|