Frequencies for first 10,000 rows of prpatr variable in namcs2015 dataset :

 Percent of |
    patient |
    revenue |
       from |
    patient |
   payments |      Freq.     Percent        Cum.
------------+-----------------------------------
         -9 |      1,531       15.31       15.31
          1 |      8,089       80.89       96.20
          2 |        198        1.98       98.18
          3 |         42        0.42       98.60
          4 |        140        1.40      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 25 Oct 2017