Frequencies for first 10,000 rows of region variable in nhamcsopd2005 dataset :

 geographic |
     region |      Freq.     Percent        Cum.
------------+-----------------------------------
  northeast |      3,757       37.57       37.57
    midwest |      2,833       28.33       65.90
      south |      1,703       17.03       82.93
       west |      1,707       17.07      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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