Frequencies for first 10,000 rows of owner variable in namcs1997 dataset :

     who owns this office (practice)? |      Freq.     Percent        Cum.
--------------------------------------+-----------------------------------
                             Hospital |        733        7.33        7.33
         Physician or physician group |      7,357       73.57       80.90
        Other health care corporation |        720        7.20       88.10
Health Maintenance Organization (HMO) |        276        2.76       90.86
                                Other |        298        2.98       93.84
                                Blank |        616        6.16      100.00
--------------------------------------+-----------------------------------
                                Total |     10,000      100.00

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