Frequencies for first 10,000 rows of region variable in nhamcsed2015 dataset :

 Geographic |
     region |      Freq.     Percent        Cum.
------------+-----------------------------------
  Northeast |      4,096       40.96       40.96
    Midwest |      5,653       56.53       97.49
      South |        251        2.51      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 20 Nov 2017