Frequencies for first 10,000 rows of prothr variable in namcs2013 dataset :

       Percent of |
  patient revenue |
       from other |      Freq.     Percent        Cum.
------------------+-----------------------------------
            Blank |      1,085       10.85       10.85
     0-25 percent |      8,536       85.36       96.21
    26-50 percent |        174        1.74       97.95
    51-75 percent |        107        1.07       99.02
   76-100 percent |         98        0.98      100.00
------------------+-----------------------------------
            Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 27 Mar 2017