| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 12 months ago | 797 |
73%
|
| 2 | 12-23 months ago | 192 |
17.6%
|
| 3 | 2 or more years ago | 101 |
9.2%
|
| 9 | Missing | 2 |
0.2%
|
| Sysmiss | 537 |