Frequencies for first 10,000 rows of ownsr variable in namcs2013 dataset :

       Who owns the practice? - recoded |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
                                  Blank |        355        3.55        3.55
           Physician or physician group |      7,793       77.93       81.48
Medical/academic health center; Communi |        732        7.32       88.80
Insurance company, health plan, or HMO; |      1,120       11.20      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 27 Mar 2017