Frequencies for first 10,000 rows of athero variable in nhamcsopd1996 dataset :

       does |
    patient |
     have - |
atheroscler |
       osis |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,878       98.78       98.78
          1 |        122        1.22      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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