Frequencies for first 10,000 rows of ssa_state_cd variable in pos2003 dataset :

 state code |
      (ssa) |      Freq.     Percent        Cum.
------------+-----------------------------------
         01 |      1,666       16.66       16.66
         02 |        219        2.19       18.85
         03 |      1,238       12.38       31.23
         04 |      1,744       17.44       48.67
         05 |      5,133       51.33      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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