Frequencies for first 10,000 rows of region variable in nhamcsopd2011 dataset :

 Geographic |
     region |      Freq.     Percent        Cum.
------------+-----------------------------------
  Northeast |      8,731       87.31       87.31
    Midwest |      1,269       12.69      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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