Frequencies for first 10,000 rows of owns variable in namcs2011 dataset :

               Who owns the practice? |      Freq.     Percent        Cum.
--------------------------------------+-----------------------------------
                                Blank |          2        0.02        0.02
         Physician or physician group |      7,531       75.31       75.33
Health Maintenance Organization (HMO) |        234        2.34       77.67
       Medical/academic health center |        291        2.91       80.58
                       Other hospital |        501        5.01       85.59
        Other health care corporation |      1,219       12.19       97.78
                                Other |        222        2.22      100.00
--------------------------------------+-----------------------------------
                                Total |     10,000      100.00

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