Frequencies for first 10,000 rows of paymcare variable in nhamcsopd2011 dataset :

   Expected |
  source of |
  payment - |
   Medicare |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      8,356       83.56       83.56
        Yes |      1,644       16.44      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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