| 1/ | 1969-74 based on 1967 SIC. 1975-87 based on 1972 SIC. 1988-96 based on 1987 SIC. | |
| 2/ | Farm income consists of proprietors' net farm income, the wages of hired farm labor, the pay-in-kind of hired farm labor, and the salaries of officers of corporate farms. | |
| 3/ | Census Bureau midyear population estimates. Estimates for 1990-96 reflect county population estimates available as of October 1995. | |
| 4/ | Personal contributions for social insurance are included in earnings by type and industry but excluded from personal income. | |
| 5/ | U.S. adjustment for residence consists of adjustments for border workers: income of U.S. residents commuting outside U.S. borders to work less income of foreign residents commuting inside U.S. borders to work plus certain Caribbean seasonal workers. | |
| 6/ | Includes the capital consumption adjustment for rental income of persons. | |
| 7/ | Includes the inventory valuation and capital consumption adjustments. | |
| 8/ | "Other" consists of wages and salaries of U.S. residents employed by international organizations and foreign embassies and consulates in the U.S. | |
| 13/ | Estimates for 1979 forward reflect Alaska Census Areas as defined in the 1980 Decennial Census; those for prior years reflect Alaska Census Divisions as defined in the 1970 Decennial Census. Estimates from 1988 forward separate Aleutian Islands Census Area into Aleutians East Borough and Aleutians West Census Area. Denali and Lake + Peninsula Boroughs begin in 1991. Estimates from 1993 forward separate Skagway-Yakutat-Angoon Census Area into Skagway-Hoonah-Angoon Census Area and Yakutat Borough. | |
| 14/ | Cibola, NM was separated from Valencia in June 1981, but in these estimates, Valencia includes Cibola through the end of 1981. | |
| 15/ | La Paz county, AZ was separated from Yuma county on January 1, 1983. | |
| A | Not shown to avoid disclosure of confidential information. | |
| B | Less than $50,000. Estimates are included in totals. | |
| C | Estimate shown constitutes the major portion of the true estimate. | |
| I | Data not available for this year. |