Frequencies for first 10,000 rows of paytyper variable in nhamcsopd2009 dataset :

      recoded expected source of |
    payment - based on hierarchy |      Freq.     Percent        Cum.
---------------------------------+-----------------------------------
all sources of payment are blank |        116        1.16        1.16
                         unknown |        340        3.40        4.56
               private insurance |      2,869       28.69       33.25
                        medicare |      1,737       17.37       50.62
                        medicaid |      3,525       35.25       85.87
           worker's compensation |         35        0.35       86.22
                        self-pay |        937        9.37       95.59
                       no charge |        232        2.32       97.91
                           other |        209        2.09      100.00
---------------------------------+-----------------------------------
                           Total |     10,000      100.00

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