| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 1 year ago | 56 |
4.1%
|
| 2 | Between 1 and 2 years ago | 257 |
19%
|
| 20 | More than 2 years ago | 1037 |
76.8%
|
| Sysmiss | 921 |