Frequencies for first 10,000 rows of paytype variable in nhamcsopd1997 dataset :

 primary expected |
source of payment |
   for this visit |      Freq.     Percent        Cum.
------------------+-----------------------------------
Private insurance |      2,146       21.46       21.46
         Medicare |      1,223       12.23       33.69
         Medicaid |      4,111       41.11       74.80
                4 |         89        0.89       75.69
         Self-pay |      1,194       11.94       87.63
        No charge |        323        3.23       90.86
            Other |        523        5.23       96.09
          Unknown |        273        2.73       98.82
            Blank |        118        1.18      100.00
------------------+-----------------------------------
            Total |     10,000      100.00

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