Frequencies for first 10,000 rows of intentr variable in nhamcsed1999 dataset :

  intentionality of injury - recoded |      Freq.     Percent        Cum.
-------------------------------------+-----------------------------------
Not applicable (not an injury visit) |      6,541       65.41       65.41
                       Unintentional |      2,651       26.51       91.92
                      Self-inflicted |         44        0.44       92.36
                             Assault |        195        1.95       94.31
                  Legal intervention |          4        0.04       94.35
                      Unknown intent |         21        0.21       94.56
              Adverse medical effect |        122        1.22       95.78
                         Blank cause |        422        4.22      100.00
-------------------------------------+-----------------------------------
                               Total |     10,000      100.00

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