Frequencies for first 10,000 rows of injury variable in nhamcsed2011 dataset :

    Is this |
      visit |
 related to |
    injury, |
  poisoning |
 or adverse |
  effect of |
    medical |
   treatmen |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      6,499       64.99       64.99
        Yes |      3,501       35.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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