Frequencies for first 10,000 rows of prmcarer variable in namcs2012 dataset :

       Percent of |
     patient care |
     revenue from |
         Medicare |      Freq.     Percent        Cum.
------------------+-----------------------------------
            Blank |        829        8.29        8.29
     0-25 percent |      4,986       49.86       58.15
    26-50 percent |      2,687       26.87       85.02
    51-75 percent |      1,390       13.90       98.92
   76-100 percent |        108        1.08      100.00
------------------+-----------------------------------
            Total |     10,000      100.00

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