Frequencies for first 10,000 rows of empstat variable in namcs2006 dataset :

 employment |
  status of |
  physician |      Freq.     Percent        Cum.
------------+-----------------------------------
      owner |      6,558       65.58       65.58
   employee |      2,960       29.60       95.18
 contractor |        428        4.28       99.46
      blank |         54        0.54      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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