Frequencies for first 10,000 rows of region variable in nhamcsopd2003 dataset :

 geographic |
     region |      Freq.     Percent        Cum.
------------+-----------------------------------
  northeast |      3,511       35.11       35.11
    midwest |      2,535       25.35       60.46
      south |      2,180       21.80       82.26
       west |      1,774       17.74      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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