Frequencies for first 10,000 rows of paypriv variable in nhamcsopd2007 dataset :

   expected |
  source of |
   payment: |
    private |
  insurance |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      6,753       67.53       67.53
        yes |      3,247       32.47      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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