Frequencies for first 10,000 rows of prmanr variable in namcs2008 dataset :

 percent of patient care revenue |
     from managed care contracts |      Freq.     Percent        Cum.
---------------------------------+-----------------------------------
                           blank |      1,917       19.17       19.17
less than or equal to 25 percent |      1,876       18.76       37.93
                   26-50 percent |      2,054       20.54       58.47
                   51-75 percent |      1,856       18.56       77.03
            more than 75 percent |      2,297       22.97      100.00
---------------------------------+-----------------------------------
                           Total |     10,000      100.00

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