| Value | Category | 
|---|---|
| -9 | Don't know | 
| 0 | None | 
| 1 | Pre-School | 
| 11 | P1 | 
| 12 | P2 | 
| 13 | P3 | 
| 14 | P4 | 
| 15 | P5 | 
| 16 | P6 | 
| 17 | JSS1 | 
| 18 | JSS2 | 
| 19 | JSS3 | 
| 20 | M1 | 
| 21 | M2 | 
| 22 | M3 | 
| 23 | M4 | 
| 24 | SSS1 | 
| 25 | SSS2 | 
| 26 | SSS3 | 
| 27 | S1 | 
| 28 | S2 | 
| 29 | S3 | 
| 30 | S4 | 
| 31 | S5 | 
| 32 | L6 | 
| 33 | U6 | 
| 41 | Voc/Tech/Computer/Comm./Agric | 
| 42 | Teacher Training | 
| 43 | Nursing | 
| 51 | Polytechnic | 
| 52 | University | 
| 53 | Other tertiary | 
| 61 | Other | 
| 99 | Missing | 
| Sysmiss |