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

rectal exam |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      9,840       98.40       98.40
        Yes |        160        1.60      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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