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

  Foot exam |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      9,392       93.92       93.92
        Yes |        608        6.08      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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