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

      Wound |
    culture |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      9,940       99.40       99.40
        Yes |         60        0.60      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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