Frequencies for first 10,000 rows of phys variable in namcs2002 dataset :

  Physician |
       seen |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |        472        4.72        4.72
        Yes |      9,528       95.28      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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