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

 percent of patient care revenue |
     from managed care contracts |      Freq.     Percent        Cum.
---------------------------------+-----------------------------------
                           blank |        896        8.96        8.96
                  not applicable |        831        8.31       17.27
less than or equal to 25 percent |      2,083       20.83       38.10
                   26-50 percent |      1,897       18.97       57.07
                   51-75 percent |      1,918       19.18       76.25
            more than 75 percent |      2,375       23.75      100.00
---------------------------------+-----------------------------------
                           Total |     10,000      100.00

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