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

 percent of patient care revenue |
          from private insurance |      Freq.     Percent        Cum.
---------------------------------+-----------------------------------
                           blank |        573        5.73        5.73
less than or equal to 25 percent |      2,233       22.33       28.06
                   26-50 percent |      3,193       31.93       59.99
                   51-75 percent |      2,238       22.38       82.37
            more than 75 percent |      1,763       17.63      100.00
---------------------------------+-----------------------------------
                           Total |     10,000      100.00

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