Frequencies for first 10,000 rows of ssa_state_cd variable in pos2013 dataset :

  SSA State |
       Code |      Freq.     Percent        Cum.
------------+-----------------------------------
         01 |      2,000       20.00       20.00
         02 |        276        2.76       22.76
         03 |      1,707       17.07       39.83
         04 |      2,047       20.47       60.30
         05 |      3,970       39.70      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 26 Jan 2016