Frequencies for first 10,000 rows of empstat variable in namcs2000 dataset :

 employment |
  status of |
  physician |      Freq.     Percent        Cum.
------------+-----------------------------------
      Owner |      7,310       73.10       73.10
   Employee |      2,505       25.05       98.15
 Contractor |        185        1.85      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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