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

       Percent of |
     patient care |
     revenue from |
private insurance |      Freq.     Percent        Cum.
------------------+-----------------------------------
            Blank |      1,085       10.85       10.85
     0-25 percent |      2,967       29.67       40.52
    26-50 percent |      2,661       26.61       67.13
    51-75 percent |      2,016       20.16       87.29
   76-100 percent |      1,271       12.71      100.00
------------------+-----------------------------------
            Total |     10,000      100.00

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