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

   Expected |
  source of |
  payment - |
    Private |
  insurance |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      7,189       71.89       71.89
        Yes |      2,811       28.11      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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