Frequencies for first 10,000 rows of intent variable in nhamcsed2002 dataset :

            intentionality of injury |      Freq.     Percent        Cum.
-------------------------------------+-----------------------------------
                               Blank |        486        4.86        4.86
                Yes (self-inflicted) |        128        1.28        6.14
                       Yes (assault) |        207        2.07        8.21
                   No, unintentional |      2,561       25.61       33.82
                             Unknown |        123        1.23       35.05
Not applicable (not an injury visit) |      6,495       64.95      100.00
-------------------------------------+-----------------------------------
                               Total |     10,000      100.00

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