Frequencies for first 10,000 rows of intent variable in namcs1998 dataset :

     intentionality of injury - from |
                            checkbox |      Freq.     Percent        Cum.
-------------------------------------+-----------------------------------
                Yes (self-inflicted) |          3        0.03        0.03
                       Yes (assault) |         23        0.23        0.26
                   No, Unintentional |        629        6.29        6.55
                             Unknown |        324        3.24        9.79
Not applicable (not an injury visit) |      9,021       90.21      100.00
-------------------------------------+-----------------------------------
                               Total |     10,000      100.00

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