Frequencies for first 10,000 rows of intentr variable in nhamcsed2005 dataset :

  intentionality of injury  based on |
                              e-code |      Freq.     Percent        Cum.
-------------------------------------+-----------------------------------
not applicable (not an injury visit) |      6,413       64.13       64.13
                       unintentional |      2,316       23.16       87.29
                      self-inflicted |         52        0.52       87.81
                             assault |        177        1.77       89.58
                  legal intervention |          2        0.02       89.60
                      unknown intent |         32        0.32       89.92
              adverse medical effect |        167        1.67       91.59
                         blank cause |        841        8.41      100.00
-------------------------------------+-----------------------------------
                               Total |     10,000      100.00

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