The average Chicagoan working an 8 hour day would be able to afford 34 Big Macs.
From The Economist.
---
On a side note, it bothers me that a high quality news source such at The Economist with access to fascinating data limits themselves to cartoony, low data-density displays. I wish they would take a lesson from The New York Times and display information like this in an interactive map showing changes over time.
