| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 12 months ago | 173 |
0.3%
|
| 2 | 12-23 months ago | 79 |
0.1%
|
| 3 | 2 or more years ago | 220 |
0.4%
|
| 9 | Missing | 19 |
0%
|
| Sysmiss | 60795 |
99.2%
|