Frequencies for first 10,000 rows of owner variable in nhamcsopd2005 dataset :

     hospital ownership |      Freq.     Percent        Cum.
------------------------+-----------------------------------
   voluntary non-profit |      7,720       77.20       77.20
government, non-federal |      2,224       22.24       99.44
            proprietary |         56        0.56      100.00
------------------------+-----------------------------------
                  Total |     10,000      100.00

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