2000. Geological Survey (U.S.). This polygon shapefile portrays the 2000 state and county boundaries of the United States, Puerto Rico, and the U.S. Virgin Islands. The map layer ... Geological Survey (U.S.).
2000. National Atlas of the United States. This data set portrays labor statistics annual averages for the years 2000 and 2001, shown by county, for the United States and Puerto Rico. The d... National Atlas of the United States.