Frequencies for first 10,000 rows of attphys variable in nhamcsed2015 dataset :

         ED |
  attending |
  physician |
       seen |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      1,593       15.93       15.93
        Yes |      8,407       84.07      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 20 Nov 2017