Frequencies for first 10,000 rows of athero variable in nhamcsopd1995 dataset :

       does |
    patient |
     have - |
atheroscler |
       osis |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,836       98.36       98.36
          1 |        164        1.64      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016