Frequencies for first 10,000 rows of rgn_cd variable in pos2016 dataset :

Region Code |      Freq.     Percent        Cum.
------------+-----------------------------------
         10 |        287        2.87        2.87
          4 |      2,117       21.17       24.04
          6 |      2,124       21.24       45.28
          9 |      5,472       54.72      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 10 Jan 2017