Frequencies for first 10,000 rows of woundcx variable in nhamcsed2010 dataset :

      Wound |
    culture |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      9,913       99.13       99.13
        yes |         87        0.87      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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