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

    CT Scan |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      9,837       98.37       98.37
        Yes |        163        1.63      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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