Frequencies for first 10,000 rows of state_cd variable in pos2010 dataset :

      STATE |
ABBREVIATIO |
          N |      Freq.     Percent        Cum.
------------+-----------------------------------
         AK |        262        2.62        2.62
         AL |      1,908       19.08       21.70
         AR |      1,962       19.62       41.32
         AZ |      1,563       15.63       56.95
         CA |      4,305       43.05      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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