| Value | Category | Cases | |
|---|---|---|---|
| 1 | Ten or more years older | 1518 |
29.4%
|
| 2 | Less than 10 years older | 3552 |
68.7%
|
| 3 | Older, unsure how much | 101 |
2%
|
| 9 | 5 | ||
| Sysmiss | 3268 |