Frequencies for first 10,000 rows of private variable in namcs2011 dataset :

       Type of |
       payment |
 accepted from |
 new patients: |
   Any private |
     insurance |      Freq.     Percent        Cum.
---------------+-----------------------------------
         Blank |        102        1.02        1.02
       Unknown |        707        7.07        8.09
Not applicable |        583        5.83       13.92
           Yes |      8,257       82.57       96.49
            No |        351        3.51      100.00
---------------+-----------------------------------
         Total |     10,000      100.00

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