Frequencies for first 10,000 rows of payself variable in nhamcsed2014 dataset :

   Expected |
  source of |
   payment: |
   Self pay |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      8,946       89.46       89.46
        Yes |      1,054       10.54      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 11 Apr 2017