Frequencies for first 10,000 rows of cancer variable in nhamcsed2012 dataset :

       Does |
    patient |
      have: |
     Cancer |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      9,700       97.00       97.00
        Yes |        300        3.00      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 7 Nov 2016