Frequencies for first 10,000 rows of incdrain variable in nhamcsed2012 dataset :

   Incision |
        and |
   drainage |
      (I&D) |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      9,915       99.15       99.15
        Yes |         85        0.85      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 7 Nov 2016