| SES quartile | AC | RA | AM | NA | IN | NGST |
|---|---|---|---|---|---|---|
| Less than first quartile | 8.955 | 6.671 | 12.821 | 13.808 | 20.528 | 62.781 |
| First to second quartile | 12.007 | 5.561 | 14.982 | 13.037 | 17.975 | 63.561 |
| Second to third quartile | 13.055 | 6.246 | 15.721 | 13.266 | 21.056 | 69.698 |
| More than third quartile | 14.309 | 8.137 | 16.560 | 14.876 | 21.394 | 75.351 |
| Mean | 12.842 | 6.850 | 15.310 | 14.070 | 20.616 | 69.687 |