Frequencies for first 10,000 rows of injury variable in namcs1999 dataset :

   is visit |
 related to |
  injury or |
 poisoning? |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,905       89.05       89.05
          1 |      1,095       10.95      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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