Frequencies for first 10,000 rows of paytype variable in nhamcsopd1998 dataset :

 primary expected |
source of payment |
   for this visit |      Freq.     Percent        Cum.
------------------+-----------------------------------
Private insurance |      2,583       25.83       25.83
         Medicare |      1,408       14.08       39.91
         Medicaid |      3,472       34.72       74.63
                4 |         69        0.69       75.32
         Self-pay |        998        9.98       85.30
        No charge |        354        3.54       88.84
            Other |        546        5.46       94.30
          Unknown |        435        4.35       98.65
            Blank |        135        1.35      100.00
------------------+-----------------------------------
            Total |     10,000      100.00

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