| Value | Category |
|---|---|
| -9 | Don't Know |
| -8 | Refused |
| -5 | Not Applicable |
| -3 | Missing |
| 0 | Grade R/0 |
| 1 | Grade 1/Sub A/Class 1 |
| 2 | Grade 2/Sub B/Class 2 |
| 3 | Grade 3/Std. 1 |
| 4 | Grade 4/Std. 2 |
| 5 | Grade 5/Std. 3 |
| 6 | Grade 6/Std. 4 |
| 7 | Grade 7/ Std. 5 |
| 8 | Grade 8/ Std. 6/Form 1 |
| 9 | Grade 9/Std. 7/Form 2 |
| 10 | Grade 10/ Std. 8/Form 3 |
| 11 | Grade 11/ Std. 9/Form 4 |
| 12 | Grade 12/Std. 10/Form 5/Matric/Senior Certificate |
| 13 | NTC 1 |
| 14 | NTC 2 |
| 15 | NTC 3 |
| 16 | Certificate with less than Grade 12/Std 10 |
| 17 | Diploma with less than Grade 12/Std 10 |
| 18 | Certificate with Grade 12/Std 10 |
| 19 | Diploma with Grade 12/Std 10 |
| 20 | Bachelors degree - Level 4 |
| 21 | Bachelors degree and Diploma |
| 22 | Honours degree |
| 23 | Higher degree (Masters Doctorate) |
| 24 | Other |
| 25 | No Schooling |
| 55 | No Higher Education |
| Sysmiss |