| Value | Category | Cases | |
|---|---|---|---|
| 0 | none | 148 |
18.4%
|
| 1 | primary inc (< 7) | 194 |
24.1%
|
| 2 | primary complete (7) | 87 |
10.8%
|
| 3 | secy incomplete (8-11) | 247 |
30.7%
|
| 4 | secy complete (12)/higher | 129 |
16%
|