| Income | Frequency | Percentage (%) | Valid Percentage (%) | Cumulative Percentage (%) |
| Low1 | 96 | 30.5 | 30.5 | 30.5 |
| Middle2 | 120 | 38.1 | 38.1 | 68.6 |
| High3 | 99 | 31.4 | 31.4 | 100.0 |
| Total | 315 | 100.0 | 100.0 |