Frequencies for first 10,000 rows of owner variable in namcs1999 dataset :

     who owns this office (practice)? |      Freq.     Percent        Cum.
--------------------------------------+-----------------------------------
                             Hospital |        651        6.51        6.51
         Physician or physician group |      8,097       80.97       87.48
        Other health care corporation |        636        6.36       93.84
Health Maintenance Organization (HMO) |        322        3.22       97.06
                                Other |        294        2.94      100.00
--------------------------------------+-----------------------------------
                                Total |     10,000      100.00

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