Frequencies for first 10,000 rows of region variable in nhamcsed2007 dataset :

 geographic |
     region |      Freq.     Percent        Cum.
------------+-----------------------------------
  northeast |      2,619       26.19       26.19
    midwest |      1,970       19.70       45.89
      south |      3,455       34.55       80.44
       west |      1,956       19.56      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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