Frequencies for first 10,000 rows of ssa_state_cd variable in pos2007 dataset :

 state code |
      (ssa) |      Freq.     Percent        Cum.
------------+-----------------------------------
         01 |      1,816       18.16       18.16
         02 |        249        2.49       20.65
         03 |      1,410       14.10       34.75
         04 |      1,891       18.91       53.66
         05 |      4,634       46.34      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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