Frequencies for first 10,000 rows of prmaidr variable in namcs2009 dataset :

 percent of patient care revenue |
                   from medicaid |      Freq.     Percent        Cum.
---------------------------------+-----------------------------------
                           blank |        328        3.28        3.28
less than or equal to 25 percent |      7,699       76.99       80.27
                   26-50 percent |      1,416       14.16       94.43
                   51-75 percent |        317        3.17       97.60
            more than 75 percent |        240        2.40      100.00
---------------------------------+-----------------------------------
                           Total |     10,000      100.00

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