Frequencies for first 10,000 rows of intent variable in nhamcsed1998 dataset :

     intentionality of injury - from |
                            checkbox |      Freq.     Percent        Cum.
-------------------------------------+-----------------------------------
                Yes (self-inflicted) |         84        0.84        0.84
                       Yes (assault) |        224        2.24        3.08
                   No, unintentional |      2,643       26.43       29.51
                             Unknown |        444        4.44       33.95
Not applicable (not an injury visit) |      6,605       66.05      100.00
-------------------------------------+-----------------------------------
                               Total |     10,000      100.00

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