| Model | Unstandardized coefficients | Standardized coefficients | T | Sig | |
| B | Std. error | Beta | |||
| Constant | 8.413 | 0.075 |
| 112.859 | 0.000 |
| Experience (exp) | 0.059 | 0.004 | 1.234 | 13.355 | 0.000 |
| Exp * exp | −0.001 | 0.000 | −0.984 | −10.405 | 0.000 |
| Secondary | 0.144 | 0.062 | 0.133 | 2.316 | 0.021 |
| Higher | 0.480 | 0.065 | 0.436 | 7.443 | 0.000 |
| R = 0.468, R2 = 0.219, F = 110.829, dF = 4 | |||||