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

 employment |
  status of |
  physician |      Freq.     Percent        Cum.
------------+-----------------------------------
      Owner |      6,770       67.70       67.70
   Employee |      2,559       25.59       93.29
 Contractor |        671        6.71      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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