according to the 2007 IL UCR.
The state actually had a pretty good year.
Illinois had a population of 12.83 million w/ a murder rate of 5.9/100K (752) in comparison to 6.2/100K last year.
Chicago had 22.1% of the population of Illinois yet accounted for 58.9% of murders w/ a per capita rate of 15.64/100K. A slight drop from last year in both population and murders.
Cook County had 41.2% of the population of Illinois yet accounted for 69.5% of murders w/ a per capita rate of 9.9/100K. It also had population and murder drops.
The Cook County murders in raw number/per capita decreased 9.7 and 9.2% respectively while arrest numbers and rates increased over 6.8% from '06 to '07. 2006 however, had an 18% drop.
If Chicago were to fall into Lake Michigan, the Illinois murder rate would drop to 3.09 .
Were the rest of Cook County to follow suit, the rate would drop to 3.03 .
So Chicago still accounts for 5x the murder rate of the rest of the state with it's "Model Gun Laws". Currently though, they are slated to break 500 murders this year, more than at any time in the last four years.