Frequencies for first 10,000 rows of wound variable in nhamcsed1996 dataset :

 wound care |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,777       87.77       87.77
          1 |      1,223       12.23      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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