| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 12 months ago | 6 |
35.3%
|
| 2 | 12-23 months ago | 8 |
47.1%
|
| 3 | 2 or more years ago | 0 |
0%
|
| 9 | Missing | 3 |
17.6%
|
| Sysmiss | 5822 |