Frequencies for first 10,000 rows of foot variable in nhamcsopd2010 dataset :

  foot exam |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      9,628       96.28       96.28
        yes |        372        3.72      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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