Frequencies for first 10,000 rows of physasst variable in nhamcsopd2004 dataset :

  physician |
  assistant |
       seen |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      9,605       96.05       96.05
        yes |        395        3.95      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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