Frequencies for first 10,000 rows of intent variable in nhamcsed2011 dataset :

          Is this injury/poisoning |
                      intentional? |      Freq.     Percent        Cum.
-----------------------------------+-----------------------------------
                           Unknown |        424        4.24        4.24
Not applicable/Not an injury visit |      6,499       64.99       69.23
               Yes, self-inflicted |        153        1.53       70.76
                      Yes, assault |        128        1.28       72.04
                 No, unintentional |      2,796       27.96      100.00
-----------------------------------+-----------------------------------
                             Total |     10,000      100.00

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