Frequencies for first 10,000 rows of paynochg variable in nhamcsopd2010 dataset :

   expected |
  source(s) |
 of payment |
   for this |
  visit: no |
     charge |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      9,671       96.71       96.71
        yes |        329        3.29      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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