Frequencies for first 10,000 rows of empstat variable in namcs2009 dataset :

 employment |
  status of |
  physician |      Freq.     Percent        Cum.
------------+-----------------------------------
      blank |         29        0.29        0.29
      owner |      6,262       62.62       62.91
   employee |      3,355       33.55       96.46
 contractor |        354        3.54      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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