Frequencies for first 10,000 rows of paytype variable in nhamcsed1999 dataset :

 primary expected |
source of payment |
   for this visit |      Freq.     Percent        Cum.
------------------+-----------------------------------
Private insurance |      3,893       38.93       38.93
         Medicare |      1,202       12.02       50.95
         Medicaid |      1,682       16.82       67.77
                4 |        241        2.41       70.18
         Self-pay |      1,514       15.14       85.32
        No charge |         55        0.55       85.87
            Other |        437        4.37       90.24
          Unknown |        890        8.90       99.14
            Blank |         86        0.86      100.00
------------------+-----------------------------------
            Total |     10,000      100.00

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