Frequencies for first 10,000 rows of staffmd variable in nhamcsed2002 dataset :

      staff |
  physician |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        881        8.81        8.81
          1 |      9,119       91.19      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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