Frequencies for first 10,000 rows of paynochg variable in nhamcsed2013 dataset :

   Expected |
  source of |
payment: No |
     charge |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      9,802       98.02       98.02
        Yes |        198        1.98      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 7 Nov 2016