Frequencies for first 10,000 rows of physasst variable in nhamcsopd2009 dataset :

  physician |
  assistant |
       seen |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      9,514       95.14       95.14
        yes |        486        4.86      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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