The News Gazette

"It's clear Illinoisans are spending their money at Indiana and Missouri casinos. Thanks in part to Illinois' indoor smoking ban, business at Indiana's four Chicago-area casinos grew 2.2 percent last year compared with a 21.5 percent loss at the four Chicago area casinos in Illinois. The percentages are similar in the St. Louis area: adjusted gross receipts at the Missouri casinos were up 8.9 percent last year, down 18 percent at the Illinois casinos."

http://www.news-gazette.com/news/local/2009/12/06/lawmakers_looking_gaming_gift_horse_in_the_mouth