| Explained Differentials | Unexplained Differentials | |||
| Actual value | Percentage (%) | Actual value | Percentage (%) | |
| 2002 | ||||
| Total | 0.698 | 105.1% | −0.034 | −5.1% |
| Decomposition category: | ||||
| Experience | 0.028 | 4.2% | 0.193 | 29.1% |
| Education | 0.234 | 35.2% | −0.005 | −0.7% |
| Health | 0.003 | 0.5% | −0.054 | −8.2% |
| Party | 0.027 | 4.0% | 0.001 | 0.1% |
| Sex | −0.001 | −0.1% | 0.051 | 7.6% |
| Race | −0.002 | −0.3% | −0.084 | −12.7% |
| Industry | 0.103 | 15.5% | 0.152 | 22.9% |
| Ownership | 0.299 | 45.1% | −0.470 | −70.8% |
| Region | 0.008 | 1.1% | −0.061 | −9.2% |
| Constant | 0.000 | 0.0% | 0.243 | 36.6% |
| 2013 | ||||
| Total | 0.168 | 130% | −0.050 | −26.9% |
| Decomposition category: | ||||
| Experience | 0.006 | 3.3% | 0.045 | 26.9% |
| Education | 0.167 | 99.8% | 0.015 | 8.7% |
| Health | −0.004 | −2.6% | 0.014 | 8.3% |
| Party | 0.008 | 4.8% | 0.000 | −0.1% |
| Sex | −0.007 | −4.4% | 0.052 | 31.1% |
| Race | 0.000 | 0.0% | −0.212 | −126.7% |
| Industry | 0.022 | 13.4% | −0.017 | −10.3% |
| Ownership | 0.026 | 15.8% | 0.014 | 8.2% |
| Region | −0.001 | −0.5% | −0.051 | −30.2% |
| Constant | 0.000 | 0.0% | 0.091 | 54.4% |