Frequencies for first 10,000 rows of empstat variable in namcs2010 dataset :

 employment |
  status of |
  physician |      Freq.     Percent        Cum.
------------+-----------------------------------
      blank |          4        0.04        0.04
      owner |      5,785       57.85       57.89
   employee |      3,845       38.45       96.34
 contractor |        366        3.66      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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