Frequencies for first 10,000 rows of wtreduc variable in nhamcsopd2009 dataset :

     weight |
  reduction |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      9,707       97.07       97.07
        yes |        293        2.93      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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