Frequencies for first 10,000 rows of state variable in ma2012 dataset :

                   State |      Freq.     Percent        Cum.
-------------------------+-----------------------------------
                         |          6        0.06        0.06
                 Alabama |      3,246       32.46       32.52
                  Alaska |         69        0.69       33.21
          American Samoa |          3        0.03       33.24
                 Arizona |      1,240       12.40       45.64
                Arkansas |      5,436       54.36      100.00
-------------------------+-----------------------------------
                   Total |     10,000      100.00

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