Frequencies for first 10,000 rows of physasst variable in nhamcsed1993 dataset :

  physician |
assistant/n |
  urse prac |
       seen |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,523       95.23       95.23
          1 |        477        4.77      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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