Frequencies for first 10,000 rows of injdet variable in namcs2009 dataset :

 is visit related to inj/poison/adverse |
                                effect? |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
                                  blank |         27        0.27        0.27
         unintentional injury/poisoning |        749        7.49        7.76
           intentional injury/poisoning |          8        0.08        7.84
      injury/poisoning - unknown intent |        275        2.75       10.59
adv effect of med/surg care/medicinal d |         75        0.75       11.34
                      none of the above |      8,866       88.66      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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