Frequencies for first 10,000 rows of rgn_cd variable in pos2015 dataset :

Region Code |      Freq.     Percent        Cum.
------------+-----------------------------------
         10 |        281        2.81        2.81
          4 |      2,086       20.86       23.67
          6 |      2,099       20.99       44.66
          9 |      5,534       55.34      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 26 Jan 2016