Frequencies for first 10,000 rows of paytyper variable in nhamcsopd2011 dataset :

 Recoded primary expected source |
                      of payment |      Freq.     Percent        Cum.
---------------------------------+-----------------------------------
All sources of payment are blank |        150        1.50        1.50
                         Unknown |        581        5.81        7.31
               Private insurance |      2,219       22.19       29.50
                        Medicare |      1,644       16.44       45.94
                Medicaid or CHIP |      4,320       43.20       89.14
           Worker's compensation |         18        0.18       89.32
                        Self-pay |        519        5.19       94.51
               No charge/Charity |        276        2.76       97.27
                           Other |        273        2.73      100.00
---------------------------------+-----------------------------------
                           Total |     10,000      100.00

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