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

   medicare |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,418       84.18       84.18
          1 |      1,582       15.82      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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