| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 12 months ago | 11 |
19.6%
|
| 2 | 12-23 months ago | 40 |
71.4%
|
| 3 | 2 or more years ago | 5 |
8.9%
|
| 9 | Missing | 0 |
0%
|
| Sysmiss | 4589 |