Frequencies for first 10,000 rows of state_cd variable in pos2008 dataset :

      state |
abbreviatio |
          n |      Freq.     Percent        Cum.
------------+-----------------------------------
         AK |        256        2.56        2.56
         AL |      1,850       18.50       21.06
         AR |      1,920       19.20       40.26
         AZ |      1,461       14.61       54.87
         CA |      4,513       45.13      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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