Frequencies for first 10,000 rows of prmanr variable in namcs2012 dataset :

       Percent of |
     patient care |
     revenue from |
     managed care |
        contracts |      Freq.     Percent        Cum.
------------------+-----------------------------------
          Unknown |      1,069       10.69       10.69
Refused to answer |          5        0.05       10.74
     0-25 percent |      4,518       45.18       55.92
    26-50 percent |      1,887       18.87       74.79
    51-75 percent |      1,203       12.03       86.82
   76-100 percent |      1,318       13.18      100.00
------------------+-----------------------------------
            Total |     10,000      100.00

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