| Value | Category | Cases | |
|---|---|---|---|
| 1 | None | 8620 |
57.5%
|
| 2 | Primary | 3664 |
24.4%
|
| 3 | Secondary + | 2391 |
15.9%
|
| 9 | Missing/DK | 103 |
0.7%
|
| Sysmiss | 222 |
1.5%
|