Frequencies for first 10,000 rows of state variable in ma2013 dataset :

                   State |      Freq.     Percent        Cum.
-------------------------+-----------------------------------
                         |          4        0.04        0.04
                 Alabama |      2,279       22.79       22.83
                  Alaska |         49        0.49       23.32
          American Samoa |          2        0.02       23.34
                 Arizona |        832        8.32       31.66
                Arkansas |      4,304       43.04       74.70
              California |      2,409       24.09       98.79
                Colorado |        121        1.21      100.00
-------------------------+-----------------------------------
                   Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 14 Apr 2016