| Value | Category | Cases | |
|---|---|---|---|
| 0 | none | 149 |
18.5%
|
| 1 | primary inc (< 7) | 207 |
25.7%
|
| 2 | primary complete (7) | 81 |
10.1%
|
| 3 | secy incomplete (8-11) | 223 |
27.7%
|
| 4 | secy complete (12)/higher | 145 |
18%
|