Frequencies for first 10,000 rows of owns variable in namcs2007 dataset :

               who owns the practice? |      Freq.     Percent        Cum.
--------------------------------------+-----------------------------------
                                blank |         22        0.22        0.22
         physician or physician group |      7,951       79.51       79.73
health maintenance organization (hmo) |        198        1.98       81.71
              community health center |         17        0.17       81.88
       medical/academic health center |        367        3.67       85.55
                       other hospital |        462        4.62       90.17
        other health care corporation |        833        8.33       98.50
                                other |        150        1.50      100.00
--------------------------------------+-----------------------------------
                                Total |     10,000      100.00

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