Frequencies for first 10,000 rows of prmanr variable in namcs2010 dataset :

 percent of patient care revenue |
     from managed care contracts |      Freq.     Percent        Cum.
---------------------------------+-----------------------------------
                           blank |      1,043       10.43       10.43
                  not applicable |        813        8.13       18.56
less than or equal to 25 percent |      2,067       20.67       39.23
                   26-50 percent |      2,363       23.63       62.86
                   51-75 percent |      1,433       14.33       77.19
            more than 75 percent |      2,281       22.81      100.00
---------------------------------+-----------------------------------
                           Total |     10,000      100.00

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