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

   intentionality of injury - recode |      Freq.     Percent        Cum.
-------------------------------------+-----------------------------------
Not applicable (not an injury visit) |      8,905       89.05       89.05
                       Unintentional |        722        7.22       96.27
                      Self-inflicted |          2        0.02       96.29
                             Assault |         26        0.26       96.55
                  Legal intervention |          2        0.02       96.57
                      Unknown intent |          3        0.03       96.60
              Adverse medical effect |         81        0.81       97.41
                         Blank cause |        259        2.59      100.00
-------------------------------------+-----------------------------------
                               Total |     10,000      100.00

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