Frequencies for first 10,000 rows of state_cd variable in pos2004 dataset :

      state |
abbreviatio |
          n |      Freq.     Percent        Cum.
------------+-----------------------------------
         AK |        229        2.29        2.29
         AL |      1,722       17.22       19.51
         AR |      1,791       17.91       37.42
         AZ |      1,268       12.68       50.10
         CA |      4,990       49.90      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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