| Value | Category | Cases | |
|---|---|---|---|
| 0 | not educated | 41 |
15.7%
|
| 1 | 1 to 6 years | 46 |
17.6%
|
| 2 | 7 to 9 years | 24 |
9.2%
|
| 3 | 10 to 12 years | 77 |
29.5%
|
| 4 | 13 to 16 years | 71 |
27.2%
|
| 5 | 17 years or more | 2 |
0.8%
|