Frequencies for first 10,000 rows of owner variable in namcs1998 dataset :

     who owns this office (practice)? |      Freq.     Percent        Cum.
--------------------------------------+-----------------------------------
                             Hospital |        945        9.45        9.45
         Physician or physician group |      7,467       74.67       84.12
        Other health care corporation |        930        9.30       93.42
Health Maintenance Organization (HMO) |        412        4.12       97.54
                                Other |        246        2.46      100.00
--------------------------------------+-----------------------------------
                                Total |     10,000      100.00

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