Frequencies for first 10,000 rows of intent variable in nhamcsed1997 dataset :

     intentionality of injury - from |
                            checkbox |      Freq.     Percent        Cum.
-------------------------------------+-----------------------------------
                Yes (self-inflicted) |         73        0.73        0.73
                       Yes (assault) |        249        2.49        3.22
                   No, unintentional |      2,917       29.17       32.39
                             Unknown |        438        4.38       36.77
Not applicable (not an injury visit) |      6,323       63.23      100.00
-------------------------------------+-----------------------------------
                               Total |     10,000      100.00

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