Frequencies for first 10,000 rows of intent variable in nhamcsed1999 dataset :

       intentionality of injury from |
                            checkbox |      Freq.     Percent        Cum.
-------------------------------------+-----------------------------------
                Yes (self-inflicted) |         81        0.81        0.81
                       Yes (assault) |        217        2.17        2.98
                   No, unintentional |      2,785       27.85       30.83
                             Unknown |        376        3.76       34.59
Not applicable (not an injury visit) |      6,541       65.41      100.00
-------------------------------------+-----------------------------------
                               Total |     10,000      100.00

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