Frequencies for first 10,000 rows of injury variable in namcs2009 dataset :

   is visit |
     injury |
   related? |
   (recode) |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      8,893       88.93       88.93
        yes |      1,107       11.07      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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