Frequencies for first 10,000 rows of intentr variable in nhamcsed2006 dataset :

  intentionality of injury  based on |
                              e-code |      Freq.     Percent        Cum.
-------------------------------------+-----------------------------------
not applicable (not an injury visit) |      6,447       64.47       64.47
                       unintentional |      2,359       23.59       88.06
                      self-inflicted |         50        0.50       88.56
                             assault |        143        1.43       89.99
                  legal intervention |          4        0.04       90.03
                      unknown intent |         59        0.59       90.62
              adverse medical effect |        173        1.73       92.35
                         blank cause |        765        7.65      100.00
-------------------------------------+-----------------------------------
                               Total |     10,000      100.00

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