Frequencies for first 10,000 rows of wound variable in nhamcsed1997 dataset :

 wound care |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,760       87.60       87.60
          1 |      1,240       12.40      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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