| Level of instruction | P value | |
| ≥Secondary | ||
Effective | 71 | 75 | 0.0410 |
Median | 271,180 | 341,320 | |
Interquartile interval | [185,480 - 515,350] | [191,580 - 2,008,630] | |
Minimum | 161,580 | 175,580 | |
Maximum | 6,532,315 | 8,023,345 |