Frequencies for first 10,000 rows of intent variable in nhamcsed2001 dataset :

            intentionality of injury |      Freq.     Percent        Cum.
-------------------------------------+-----------------------------------
                               Blank |        603        6.03        6.03
                Yes (self-inflicted) |        149        1.49        7.52
                       Yes (assault) |        187        1.87        9.39
                   No, unintentional |      2,565       25.65       35.04
                             Unknown |        186        1.86       36.90
Not applicable (not an injury visit) |      6,310       63.10      100.00
-------------------------------------+-----------------------------------
                               Total |     10,000      100.00

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