Frequencies for first 10,000 rows of injury variable in namcs1994 dataset :

    is this |
      visit |
     injury |
   related? |      Freq.     Percent        Cum.
------------+-----------------------------------
        Yes |      1,321       13.21       13.21
         No |      8,679       86.79      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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