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

       Percent of |
  patient revenue |
     from patient |
         payments |      Freq.     Percent        Cum.
------------------+-----------------------------------
            Blank |        829        8.29        8.29
     0-25 percent |      8,324       83.24       91.53
    26-50 percent |        336        3.36       94.89
    51-75 percent |        118        1.18       96.07
   76-100 percent |        393        3.93      100.00
------------------+-----------------------------------
            Total |     10,000      100.00

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