Frequencies for first 10,000 rows of ssa_state_cd variable in pos1991 dataset :

 state code |
      (ssa) |      Freq.     Percent        Cum.
------------+-----------------------------------
         01 |      1,236       12.36       12.36
         02 |        145        1.45       13.81
         03 |        861        8.61       22.42
         04 |      1,217       12.17       34.59
         05 |      5,720       57.20       91.79
         06 |        821        8.21      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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