Frequencies for first 10,000 rows of ssa_state_cd variable in pos2012 dataset :

  SSA State |
       Code |      Freq.     Percent        Cum.
------------+-----------------------------------
         01 |      2,091       20.91       20.91
         02 |        279        2.79       23.70
         03 |      1,747       17.47       41.17
         04 |      2,062       20.62       61.79
         05 |      3,821       38.21      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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