Frequencies for first 10,000 rows of region variable in nhamcsed2005 dataset :

 geographic |
     region |      Freq.     Percent        Cum.
------------+-----------------------------------
  northeast |      2,210       22.10       22.10
    midwest |      1,416       14.16       36.26
      south |      4,081       40.81       77.07
       west |      2,293       22.93      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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