Bicycling Contributes nearly $1.5 billion to Wisconsin's Economy every year.

http://volumeone.org/blogs/The_Daily_Shakedown/post/1468/Bicycling_adds_about_1_5_billion_to_the_Wis_economy_per_year.html

http://www.bfw.org/education/index.php?category_id=4746

good discussion hosted at volumeone link above...