Frequencies for first 10,000 rows of owns variable in namcs2004 dataset :

              who owns this practice? |      Freq.     Percent        Cum.
--------------------------------------+-----------------------------------
         Physician or physician group |      8,752       87.52       87.52
Health Maintenance Organization (HMO) |        164        1.64       89.16
       Medical/academic health center |        302        3.02       92.18
                       Other hospital |        213        2.13       94.31
        Other health care corporation |        377        3.77       98.08
                                Other |        192        1.92      100.00
--------------------------------------+-----------------------------------
                                Total |     10,000      100.00

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