Frequencies for first 10,000 rows of region variable in nhamcsed2013 dataset :

 Geographic |
     region |      Freq.     Percent        Cum.
------------+-----------------------------------
  Northeast |      3,053       30.53       30.53
    Midwest |      2,224       22.24       52.77
      South |      1,573       15.73       68.50
       West |      3,150       31.50      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 7 Nov 2016