Census 2000 pl 94 171 techdoc
Delaware FL Florida GA Georgia GU Guam HI Hawaii IA Iowa ID Idaho IL Illinois IN Indiana...South Central 7 West South Central 8 Mountain 9 Pacific State(Census) 6 STATECE
https://www.census.gov/content/dam/Census/programs-surveys/rdo/TechnicalDocumentation/Census2000_pl94-171_techdoc.pdf