Frequencies for first 10,000 rows of colon variable in namcs2013 dataset :

Colonoscopy |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      9,792       97.92       97.92
        Yes |        208        2.08      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 27 Mar 2017