Frequencies for first 10,000 rows of paytype variable in namcs2007 dataset :

 type of payment (primary, based |
                   on hierarchy) |      Freq.     Percent        Cum.
---------------------------------+-----------------------------------
all sources of payment are blank |        161        1.61        1.61
                         unknown |        167        1.67        3.28
               private insurance |      5,617       56.17       59.45
                        medicare |      1,872       18.72       78.17
                        medicaid |      1,366       13.66       91.83
           worker's compensation |         66        0.66       92.49
                        self-pay |        490        4.90       97.39
                       no charge |         11        0.11       97.50
                           other |        250        2.50      100.00
---------------------------------+-----------------------------------
                           Total |     10,000      100.00

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