Frequencies for first 10,000 rows of revcaser variable in namcs2011 dataset :

 Percent of patient care revenue |
                 from case rates |      Freq.     Percent        Cum.
---------------------------------+-----------------------------------
                           Blank |      1,242       12.42       12.42
Less than or equal to 25 percent |      8,602       86.02       98.44
                   26-50 percent |        101        1.01       99.45
                   51-75 percent |         30        0.30       99.75
            More than 75 percent |         25        0.25      100.00
---------------------------------+-----------------------------------
                           Total |     10,000      100.00

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