Frequencies for first 10,000 rows of catscan variable in nhamcsed2014 dataset :

    CT scan |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      8,519       85.19       85.19
        Yes |      1,481       14.81      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 11 Apr 2017