Frequencies for first 10,000 rows of intentr variable in nhamcsed2007 dataset :

  intentionality of injury  based on |
                              e-code |      Freq.     Percent        Cum.
-------------------------------------+-----------------------------------
                               blank |        834        8.34        8.34
not applicable (not an injury visit) |      6,502       65.02       73.36
                       unintentional |      2,262       22.62       95.98
                      self-inflicted |         44        0.44       96.42
                             assault |        164        1.64       98.06
                  legal intervention |          9        0.09       98.15
                      unknown intent |         31        0.31       98.46
              adverse medical effect |        154        1.54      100.00
-------------------------------------+-----------------------------------
                               Total |     10,000      100.00

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