Frequencies for first 10,000 rows of owner variable in nhamcsopd2004 dataset :

     hospital ownership |      Freq.     Percent        Cum.
------------------------+-----------------------------------
   voluntary non-profit |      7,278       72.78       72.78
government, non-federal |      2,296       22.96       95.74
            proprietary |        426        4.26      100.00
------------------------+-----------------------------------
                  Total |     10,000      100.00

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