545.5 million
Chicago-style hot dogs
Photo: Alex Garcia/Chicago Tribune
5,117
years’ worth of supplies for Chicago public schools
Photo: istockphoto
2,497
miles of resurfaced street
27
Maggie Daley Parks
3.5
reconstructions of CTA rail lines
Photo: Courtesy of CTA
1
Willis Tower, with a 590,000-square-foot addition
Photo: Courtesy of Willis Tower