Frequencies for first 10,000 rows of prmanr variable in namcs2013 dataset :

       Percent of |
     patient care |
     revenue from |
     managed care |
        contracts |      Freq.     Percent        Cum.
------------------+-----------------------------------
          Unknown |      1,599       15.99       15.99
Refused to answer |         42        0.42       16.41
     0-25 percent |      3,751       37.51       53.92
    26-50 percent |      1,720       17.20       71.12
    51-75 percent |      1,272       12.72       83.84
   76-100 percent |      1,616       16.16      100.00
------------------+-----------------------------------
            Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 27 Mar 2017