Frequencies for first 10,000 rows of owner variable in nhamcsopd2008 dataset :

     hospital ownership |      Freq.     Percent        Cum.
------------------------+-----------------------------------
   voluntary non-profit |      8,146       81.46       81.46
government, non-federal |      1,758       17.58       99.04
            proprietary |         96        0.96      100.00
------------------------+-----------------------------------
                  Total |     10,000      100.00

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