10. Washington, District of Columbia (USA)
Projected 2016 GDP per capita, PPP: $70,843
Washington, D.C. is the city with the highest negative GDP per capita growth on this list. -1.5% per year means that more than 6 million of the capital’s citizens earn less in 2016 ($70,843) than they were in 2014 ($73,017). If this trend continues in 2017, Perth and New York will easily surpass it, and so will Durham.