| Value | Category |
|---|---|
| 1 | None |
| 2 | R1 - R2 400 |
| 3 | R2 401 - R6 000 |
| 4 | R6 001 - R12 000 |
| 5 | R12 001 - R18 000 |
| 6 | R18 001 - R30 000 |
| 7 | R30 001 - R42 000 |
| 8 | R42 001 - R54 000 |
| 9 | R54 001 - R72 000 |
| 10 | R72 001 - R96 000 |
| 11 | R96 001 - R132 000 |
| 12 | R132 001 - R192 000 |
| 13 | R192 001 - R360 000 |
| 14 | R360 001+ |
| 15 | Don't know |
| 16 | Refuse |
| 88 | Not applicable |
| 99 | Unspecified |