Frequencies for first 10,000 rows of paytype variable in nhamcsed1997 dataset :

 primary expected |
source of payment |
   for this visit |      Freq.     Percent        Cum.
------------------+-----------------------------------
Private insurance |      3,493       34.93       34.93
         Medicare |      1,292       12.92       47.85
         Medicaid |      1,987       19.87       67.72
                4 |        299        2.99       70.71
         Self-pay |      1,736       17.36       88.07
        No charge |         67        0.67       88.74
            Other |        369        3.69       92.43
          Unknown |        662        6.62       99.05
            Blank |         95        0.95      100.00
------------------+-----------------------------------
            Total |     10,000      100.00

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