Frequencies for first 10,000 rows of physasst variable in nhamcsed2001 dataset :

  physician |
  assistant |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,577       95.77       95.77
          1 |        423        4.23      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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