Frequencies for first 10,000 rows of exercise variable in namcs2006 dataset :

   exercise |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      8,943       89.43       89.43
        yes |      1,057       10.57      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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