Frequencies for first 10,000 rows of debride variable in nhamcsed2008 dataset :

      wound |
debridement |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      9,834       98.34       98.34
        yes |        166        1.66      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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