Frequencies for first 10,000 rows of state_cd variable in pos2000 dataset :

      state |
abbreviatio |
          n |      Freq.     Percent        Cum.
------------+-----------------------------------
         AK |        204        2.04        2.04
         AL |      1,525       15.25       17.29
         AR |      1,614       16.14       33.43
         AZ |      1,118       11.18       44.61
         CA |      5,539       55.39      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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