Frequencies for first 10,000 rows of incdrain variable in nhamcsed2015 dataset 

   Incision |
        and |
drainage (I |
       & D) |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      9,929       99.29       99.29
        Yes |         71        0.71      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 20 Nov 2017