Frequencies for first 10,000 rows of region variable in nhamcsopd2004 dataset :

 geographic |
     region |      Freq.     Percent        Cum.
------------+-----------------------------------
  northeast |      3,627       36.27       36.27
    midwest |      2,622       26.22       62.49
      south |      2,300       23.00       85.49
       west |      1,451       14.51      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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