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

       Percent of |
  patient revenue |
       from other |      Freq.     Percent        Cum.
------------------+-----------------------------------
            Blank |        829        8.29        8.29
     0-25 percent |      8,702       87.02       95.31
    26-50 percent |        302        3.02       98.33
    51-75 percent |         45        0.45       98.78
   76-100 percent |        122        1.22      100.00
------------------+-----------------------------------
            Total |     10,000      100.00

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