Frequencies for first 10,000 rows of rectal variable in nhamcsopd1996 dataset :

rectal exam |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,634       96.34       96.34
          1 |        366        3.66      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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