Frequencies for first 10,000 rows of exercise variable in nhamcsopd2006 dataset :

   exercise |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      9,456       94.56       94.56
        Yes |        544        5.44      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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