Frequencies for first 10,000 rows of state_cd variable in pos2013 dataset :

      State |
Abbreviatio |
          n |      Freq.     Percent        Cum.
------------+-----------------------------------
         AK |        276        2.76        2.76
         AL |      2,000       20.00       22.76
         AR |      2,047       20.47       43.23
         AZ |      1,707       17.07       60.30
         CA |      3,970       39.70      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 26 Jan 2016