Frequencies for first 10,000 rows of endoscop variable in namcs2002 dataset :

  Endoscopy |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      9,897       98.97       98.97
        Yes |        103        1.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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