Frequencies for first 10,000 rows of paytype variable in namcs2002 dataset :

     Primary expected |
    source of payment |      Freq.     Percent        Cum.
----------------------+-----------------------------------
                Blank |        220        2.20        2.20
    Private insurance |      5,792       57.92       60.12
             Medicare |      2,205       22.05       82.17
             Medicaid |        714        7.14       89.31
Worker's compensation |        160        1.60       90.91
             Self-pay |        510        5.10       96.01
            No charge |         33        0.33       96.34
                Other |        206        2.06       98.40
              Unknown |        160        1.60      100.00
----------------------+-----------------------------------
                Total |     10,000      100.00

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