| Value | Category |
|---|---|
| 1 | R0 |
| 2 | R1 - R99 |
| 3 | R100 - R199 |
| 4 | R200 - R299 |
| 5 | R300 - R399 |
| 6 | R400 - R499 |
| 7 | R500 - R699 |
| 8 | R700 - R899 |
| 9 | R900 - R1 099 |
| 10 | R1 100 - R1 299 |
| 11 | R1 300 - R1 499 |
| 12 | R1 500 - R1 899 |
| 13 | R1 900 - R2 299 |
| 14 | R2 300 or more |
| 15 | Do not know |
| 16 | Refuse |
| 99 | Unspecified |