Frequencies for first 10,000 rows of owns variable in namcs2002 dataset :

              Who owns this practice? |      Freq.     Percent        Cum.
--------------------------------------+-----------------------------------
         Physician or physician group |      8,889       88.89       88.89
Health Maintenance Organization (HMO) |         67        0.67       89.56
       Medical/academic health center |        172        1.72       91.28
                       Other hospital |        265        2.65       93.93
        Other health care corporation |        345        3.45       97.38
                                Other |        262        2.62      100.00
--------------------------------------+-----------------------------------
                                Total |     10,000      100.00

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