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

       Percent of |
     patient care |
revenue from case |
            rates |      Freq.     Percent        Cum.
------------------+-----------------------------------
            Blank |      2,069       20.69       20.69
          Unknown |        101        1.01       21.70
     0-25 percent |      7,488       74.88       96.58
    26-50 percent |        134        1.34       97.92
    51-75 percent |         30        0.30       98.22
   76-100 percent |        178        1.78      100.00
------------------+-----------------------------------
            Total |     10,000      100.00

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