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

 Ownership status |
     of physician |      Freq.     Percent        Cum.
------------------+-----------------------------------
          Unknown |         35        0.35        0.35
Refused to answer |          1        0.01        0.36
       Full-owner |      4,212       42.12       42.48
       Part-owner |      2,340       23.40       65.88
         Employee |      3,093       30.93       96.81
       Contractor |        319        3.19      100.00
------------------+-----------------------------------
            Total |     10,000      100.00

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