Frequencies for first 10,000 rows of paytyper variable in nhamcsopd2008 dataset :

      recoded expected source of |
    payment - based on hierarchy |      Freq.     Percent        Cum.
---------------------------------+-----------------------------------
all sources of payment are blank |         64        0.64        0.64
                         unknown |        207        2.07        2.71
               private insurance |      3,666       36.66       39.37
                        medicare |      1,882       18.82       58.19
                        medicaid |      3,069       30.69       88.88
           worker's compensation |         98        0.98       89.86
                        self-pay |        525        5.25       95.11
                       no charge |        316        3.16       98.27
                           other |        173        1.73      100.00
---------------------------------+-----------------------------------
                           Total |     10,000      100.00

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