| Value | Category |
|---|---|
| 1 | KINDERGARTEN |
| 2 | PRIMARY (GRADES 1-4) |
| 3 | BASIC (GRADES 5-8(9)) |
| 4 | SECONDARY GENERAL (GRADES 9-10(11)) |
| 5 | SECONDARY SPECIAL |
| 6 | SECONDARY TECHNICAL |
| 7 | UNDERGRADUATE |
| 8 | BACHELOR |
| 9 | HIGHER EDUCATION |
| 10 | MASTER / MAGISTRACY |
| 11 | GRADUATE/ASPIRANTURA |
| 12 | POST GRADUATE |
| 13 | NONE |
| 14 | DON'T KNOW |
| Sysmiss |