Even Chicago
WAS on a downward trend... not anymore in the last 3 years.
You notice how all these charts start to rapidly rise in the late 70's but then crash in the 90's?
Crack Cocaine Bitches. It's a combination of the drug wars, war on drugs and also, others have theorized Abortion. By the mid 90's is when the majority of unwanted babies after the legalization of Abortion happened would have bee in there 20's... and causing crime.