| Value | Category | Cases | |
|---|---|---|---|
| 0 | none | 700 |
17.5%
|
| 1 | primary inc (< 7) | 974 |
24.4%
|
| 2 | primary complete (7) | 453 |
11.4%
|
| 3 | secy incomplete (8-11) | 1419 |
35.6%
|
| 4 | secy complete (12)/higher | 443 |
11.1%
|