| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 12 months ago | 169 |
1%
|
| 2 | 12-23 months ago | 103 |
0.6%
|
| 3 | 2 or more years ago | 187 |
1.1%
|
| 9 | Missing | 10 |
0.1%
|
| Sysmiss | 15979 |
97.1%
|