| Value | Category | 
|---|---|
| 0 | |
| 1 | illiterate | 
| 2 | literate | 
| 3 | without formal schooling | 
| 4 | below primary | 
| 5 | primary middle | 
| 6 | secondary | 
| 7 | higher secondary | 
| 8 | graduate and above | 
| 9 | |
| 10 | |
| 11 | |
| 12 | |
| 13 | |
| 14 | |
| 15 | |
| 16 | |
| 17 | |
| 18 | |
| 19 | |
| 20 | |
| 21 | |
| 23 | |
| 24 | |
| 25 | |
| 26 | |
| 30 | |
| 31 | |
| 35 | |
| 37 | |
| 38 | |
| 39 | |
| 40 | |
| 41 | |
| 44 | |
| 48 | |
| 51 | |
| 52 | |
| 55 | |
| 57 | |
| 58 | |
| 60 | |
| 61 | |
| 62 | |
| 63 | |
| 64 | |
| 65 | |
| 67 | |
| 69 | |
| 72 | |
| 77 | |
| 81 | |
| 91 | |
| 92 | |
| 95 | |
| 97 | |
| 99 | |
| Sysmiss |