Here's an article from 2006, and the number has increased significantly since, but this is just an example of how corrupt IL is.
Its persistence was documented in Sept. 7, 2006 by the Chicago Sun-Times, which reported that at least 79 current or former Illinois, Chicago or Cook County elected officials had been found guilty of a crime by judges, juries or their own pleas since 1972. The paper provided this tally of the tarnished: three governors, two other state officials, 15 state legislators, two congressmen, one mayor, three other city officials, 27 aldermen, 19 Cook County judges and seven other Cook County officials.
And here's a more recent tally: (From 2012)
Just last week, Chicago was named the most corrupt city in America according to a study by the University of Illinois at Chicago and the University of Illinois' Institute of Government and Public Affairs.
The report cites federal data showing that, between 1976 and 2010, there were 1,531 convictions for public corruption in "the federal district dominated by Chicago," according to the Associated Press.
Something to be proud of I guess !