Frequencies for first 10,000 rows of staffmd variable in nhamcsed2004 dataset :

      staff |
  physician |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      1,241       12.41       12.41
        yes |      8,759       87.59      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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