| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 12 months ago | 50 |
0.1%
|
| 2 | 12-23 months ago | 58 |
0.1%
|
| 3 | 2 or more years ago | 16 |
0%
|
| 9 | Missing | 2 |
0%
|
| Sysmiss | 61160 |
99.8%
|