Frequencies for first 10,000 rows of ssa_state_cd variable in pos2005 dataset :

 state code |
      (ssa) |      Freq.     Percent        Cum.
------------+-----------------------------------
         01 |      1,751       17.51       17.51
         02 |        240        2.40       19.91
         03 |      1,321       13.21       33.12
         04 |      1,830       18.30       51.42
         05 |      4,858       48.58      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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