Frequencies for first 10,000 rows of phys variable in namcs2011 dataset :

  Physician |
       seen |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |        409        4.09        4.09
        Yes |      9,591       95.91      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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