Frequencies for first 10,000 rows of paytype variable in nhamcsed2003 dataset :

   expected source of |
     payment for this |
                visit |      Freq.     Percent        Cum.
----------------------+-----------------------------------
                blank |         82        0.82        0.82
    private insurance |      3,633       36.33       37.15
             medicare |      1,600       16.00       53.15
             medicaid |      2,115       21.15       74.30
worker's compensation |        223        2.23       76.53
             self-pay |      1,481       14.81       91.34
            no charge |         55        0.55       91.89
                other |        270        2.70       94.59
              unknown |        541        5.41      100.00
----------------------+-----------------------------------
                Total |     10,000      100.00

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