Frequencies for first 10,000 rows of owner variable in nhamcsopd2009 dataset :

     hospital ownership |      Freq.     Percent        Cum.
------------------------+-----------------------------------
   voluntary non-profit |      6,726       67.26       67.26
government, non-federal |      2,722       27.22       94.48
            proprietary |        552        5.52      100.00
------------------------+-----------------------------------
                  Total |     10,000      100.00

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