Proportion of Murders Committed by Age of Offender

If you ask anyone, you'll quickly learn that kids today commit far more murders than they used to.  Kids and teenagers today are just more violent, more brutal, right?

As with every "the world is worse" stories one is told by anyone over twenty (who inevitably believe that the world is always worse), this one is incorrect.  Below, Corrections plots the proportion of total murders by age (click to enlarge).