Frequencies for first 10,000 rows of rgn_cd variable in pos2018 dataset :

Region Code |      Freq.     Percent        Cum.
------------+-----------------------------------
         10 |        294        2.94        2.94
          4 |      2,183       21.83       24.77
          6 |      2,200       22.00       46.77
          9 |      5,323       53.23      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 15 Feb 2019