Frequencies for first 10,000 rows of colon variable in namcs2014 dataset :

Colonoscopy |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      9,857       98.57       98.57
        Yes |        143        1.43      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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