Frequencies for first 10,000 rows of paytype variable in nhamcsopd2002 dataset :

 primary expected |
source of payment |      Freq.     Percent        Cum.
------------------+-----------------------------------
            Blank |        159        1.59        1.59
Private insurance |      2,310       23.10       24.69
         Medicare |      1,174       11.74       36.43
         Medicaid |      3,687       36.87       73.30
                4 |         82        0.82       74.12
         Self-pay |        767        7.67       81.79
        No charge |        430        4.30       86.09
            Other |        193        1.93       88.02
          Unknown |      1,198       11.98      100.00
------------------+-----------------------------------
            Total |     10,000      100.00

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