Frequencies for first 10,000 rows of owns variable in namcs2009 dataset :

               who owns the practice? |      Freq.     Percent        Cum.
--------------------------------------+-----------------------------------
                                blank |         32        0.32        0.32
         physician or physician group |      7,959       79.59       79.91
health maintenance organization (hmo) |        195        1.95       81.86
              community health center |         83        0.83       82.69
       medical/academic health center |        273        2.73       85.42
                       other hospital |        600        6.00       91.42
        other health care corporation |        655        6.55       97.97
                                other |        203        2.03      100.00
--------------------------------------+-----------------------------------
                                Total |     10,000      100.00

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