Frequencies for first 10,000 rows of intentr variable in nhamcsopd1999 dataset :

   intentionality of injury - recode |      Freq.     Percent        Cum.
-------------------------------------+-----------------------------------
Not applicable (not an injury visit) |      8,998       89.98       89.98
                       Unintentional |        627        6.27       96.25
                      Self-inflicted |          2        0.02       96.27
                             Assault |         27        0.27       96.54
                  Legal intervention |          1        0.01       96.55
                      Unknown intent |         17        0.17       96.72
              Adverse medical effect |         58        0.58       97.30
                         Blank cause |        270        2.70      100.00
-------------------------------------+-----------------------------------
                               Total |     10,000      100.00

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