States of the U.S.
 
DATA DESCRIPTION:
name, abb:     character names  and  abbreviations  for  50  U.S.
       states, sorted alphabetically by name.
center:    list  with  components  named  x  and  y  giving   the
       approximate  geographic  center  of each state in negative
       longitude and latitude (as used by function usa).   Alaska
       and Hawaii are placed just off the West Coast.
region:    category  giving  region  (Northeast,   South,   North
       Central, West) that each state belongs to.
division:   category giving state divisions (New England,  Middle
       Atlantic,  South  Atlantic, East South Central, West South
       Central, East North Central, West North Central, Mountain,
       and Pacific).
x77:   matrix giving statistics  for  the  states.   Columns  are
       Population  estimate as of July 1, 1975; Per capita Income
       (1974); Illiteracy (1970,  percent  of  population);  Life
       Expectancy  in  years  (1969-71); Murder and non-negligent
       manslaughter rate per 100,000 population  (1976);  Percent
       High-school Graduates (1970); Mean Number of days with min
       temperature < 32 degrees (1931-1960) in capital  or  large
       city; and Land Area in square miles.
 
SOURCE:
       Statistical Abstract  of  the  United  States,  1977,  and
       County  and  City  Data  Book,  1977,  U.S.  Department of
       Commerce, Bureau of the Census.