Frequencies for first 10,000 rows of RGN_CD variable in pos2011 dataset :

Region Code |      Freq.     Percent        Cum.
------------+-----------------------------------
         04 |      2,064       20.64       20.64
         06 |      2,045       20.45       41.09
         09 |      5,614       56.14       97.23
         10 |        277        2.77      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 19 Apr 2019