Frequencies for first 10,000 rows of payself variable in namcs2005 dataset :

   expected |
  source of |
  payment - |
   self pay |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,630       96.30       96.30
          1 |        370        3.70      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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