Frequencies for first 10,000 rows of state_cd variable in pos2007 dataset :

      state |
abbreviatio |
          n |      Freq.     Percent        Cum.
------------+-----------------------------------
         AK |        249        2.49        2.49
         AL |      1,816       18.16       20.65
         AR |      1,891       18.91       39.56
         AZ |      1,410       14.10       53.66
         CA |      4,634       46.34      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 17 May 2017