Frequencies for first 10,000 rows of rgn_cd variable in pos2017 dataset :

Region Code |      Freq.     Percent        Cum.
------------+-----------------------------------
         10 |        293        2.93        2.93
          4 |      2,148       21.48       24.41
          6 |      2,161       21.61       46.02
          9 |      5,398       53.98      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 9 Jan 2018