Frequencies for first 10,000 rows of intent variable in nhamcsed2010 dataset :

          Intentionality of injury |      Freq.     Percent        Cum.
-----------------------------------+-----------------------------------
                           unknown |        458        4.58        4.58
not applicable/not an injury visit |      6,502       65.02       69.60
               yes, self-inflicted |        189        1.89       71.49
                      yes, assault |        175        1.75       73.24
                 no, unintentional |      2,676       26.76      100.00
-----------------------------------+-----------------------------------
                             Total |     10,000      100.00

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