18. Madison, Wisconsin (USA)
Projected 2016 GDP per capita, PPP: $66,307
People living in Wisconsin’s capital enjoy the yearly GDP rise of 0.3%. In purchasing power parity GDP, that translates to $66,307 for 2016 compared to $65,911 for 2014. Not bad for a city of some 250,000 inhabitants and a metro of around 650,000 citizens.