| Value | Category | Cases | |
|---|---|---|---|
| 1 | Ten or more years older | 1467 |
29.3%
|
| 2 | Less than 10 years older | 3461 |
69.2%
|
| 3 | Older, unsure how much | 76 |
1.5%
|
| 9 | 5 | ||
| Sysmiss | 1070 |