| Value | Category | Cases | |
|---|---|---|---|
| 0 | none | 423 |
14.3%
|
| 1 | primary inc (< 7) | 765 |
25.9%
|
| 2 | primary complete (7) | 291 |
9.9%
|
| 3 | secy incomplete (8-11) | 1043 |
35.3%
|
| 4 | secy complete (12)/higher | 432 |
14.6%
|