Frequencies for first 10,000 rows of empstat variable in namcs2004 dataset :

 employment |
  status of |
  physician |      Freq.     Percent        Cum.
------------+-----------------------------------
      Owner |      7,669       76.69       76.69
   Employee |      2,073       20.73       97.42
 Contractor |        258        2.58      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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