Frequencies for first 10,000 rows of intent variable in nhamcsed2003 dataset :

            intentionality of injury |      Freq.     Percent        Cum.
-------------------------------------+-----------------------------------
                               blank |        533        5.33        5.33
                yes (self-inflicted) |        160        1.60        6.93
                       yes (assault) |        138        1.38        8.31
                   no, unintentional |      2,626       26.26       34.57
                             unknown |        129        1.29       35.86
not applicable (not an injury visit) |      6,414       64.14      100.00
-------------------------------------+-----------------------------------
                               Total |     10,000      100.00

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