| Value | Category | Cases | |
|---|---|---|---|
| 1 | None | 3520 |
73.6%
|
| 2 | Primary | 540 |
11.3%
|
| 3 | Secondary + | 701 |
14.6%
|
| 9 | Missing/DK | 24 |
0.5%
|
| Sysmiss | 169 |