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

       does |
    patient |
     have - |
    chronic |
      renal |
    failure |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,944       99.44       99.44
          1 |         56        0.56      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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