| 0 CENTRAL COUNTIES OF METRO AREA WITH ONE MILLION OR MORE |
| 1 FRINGE COUNTIES OF A METRO AREA WITH ONE MILLION OR MORE |
| 2 COUNTIES IN METRO AREAS WITH 250,000 TO ONE MILLION |
| 3 COUNTIES IN METRO AREA OF FEWER THAN 250,000 POPULATION |
| 4 URBAN POPULATIONS OF 20,000 OR MORE, ADJACENT TO A METRO AREA |
| 5 URBAN POPULATIONS OF 20,000 OR MORE, NOT ADJACENT TO A METRO AREA |
| 6 URBAN POPULATIONS OF 2,500 TO 19,999, ADJACENT TO A METRO AREA |
| 7 URBAN POPULATIONS OF 2,500 TO 19,999, NOT ADJACENT TO A METRO AREA |
| 8 COMPLETELY RURAL OR < 2,500 URBAN POPULATION, ADJACENT TO A METRO AREA |
| 9 COMPLETELY RURAL OR < 2,500 URBAN POPULATION, NOT ADJACENT TO A METRO AREA |
| ACF/OFA: 01-09-2006 |