| Value | Category | Cases | |
|---|---|---|---|
| 1 | Ten or more years older | 6481 |
33.9%
|
| 2 | Less than 10 years older | 12202 |
63.8%
|
| 3 | Older, unsure how much | 438 |
2.3%
|
| 9 | 24 | ||
| Sysmiss | 3389 |