Frequencies for first 10,000 rows of injury variable in namcs2005 dataset :

  is injury |
      visit |
   related? |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      9,124       91.24       91.24
        Yes |        876        8.76      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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