| Earned income (salary) | OLI_INCOMESOURCE_EARNED | 1 |
| Employer-sponsored retirement plan | OLI_INCOMESOURCE_RENTAL | 4 |
| Individual Retirement Account (IRA) | OLI_INCOMESOURCE_SPOUSAL | 2 |
| Investments | OLI_INCOMESOURCE_INVESTMENT | 3 |
| Other | OLI_OTHER | 2147483647 |
| Reverse mortgage | OLI_INCOMESOURCE_REVMTGE | 5 |
| Social security | OLI_INCOMESOURCE_SS | 6 |
| Unknown | OLI_UNKNOWN | 0 |
|