Frequencies for first 10,000 rows of attphys variable in nhamcsed2009 dataset :

         ed |
  attending |
  physician |
       seen |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      1,279       12.79       12.79
          1 |      8,721       87.21      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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