Frequencies for first 10,000 rows of region variable in nhamcsed2006 dataset :

 geographic |
     region |      Freq.     Percent        Cum.
------------+-----------------------------------
  northeast |      2,234       22.34       22.34
    midwest |      2,245       22.45       44.79
      south |      3,061       30.61       75.40
       west |      2,460       24.60      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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