Frequencies for first 10,000 rows of paytype variable in nhamcsopd1999 dataset :

 primary expected |
source of payment |
   for this visit |      Freq.     Percent        Cum.
------------------+-----------------------------------
Private insurance |      3,123       31.23       31.23
         Medicare |      1,272       12.72       43.95
         Medicaid |      2,994       29.94       73.89
                4 |         72        0.72       74.61
         Self-pay |      1,034       10.34       84.95
        No charge |        319        3.19       88.14
            Other |        513        5.13       93.27
          Unknown |        538        5.38       98.65
            Blank |        135        1.35      100.00
------------------+-----------------------------------
            Total |     10,000      100.00

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