Frequencies for first 10,000 rows of region variable in nhamcsed2010 dataset :

 Geographic |
     region |      Freq.     Percent        Cum.
------------+-----------------------------------
  northeast |      1,690       16.90       16.90
    midwest |      2,397       23.97       40.87
      south |      3,827       38.27       79.14
       west |      2,086       20.86      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016