Frequencies for first 10,000 rows of injprev variable in namcs2012 dataset :

     Injury |
 prevention |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      9,797       97.97       97.97
        Yes |        203        2.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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