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

       Percent of |
     patient care |
     revenue from |
private insurance |      Freq.     Percent        Cum.
------------------+-----------------------------------
            Blank |        829        8.29        8.29
     0-25 percent |      3,029       30.29       38.58
    26-50 percent |      2,890       28.90       67.48
    51-75 percent |      1,852       18.52       86.00
   76-100 percent |      1,400       14.00      100.00
------------------+-----------------------------------
            Total |     10,000      100.00

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