2012 Quality of Living survey
"Vienna retains the top spot as the city with the world’s best quality of living, according to the Mercer 2012 Quality of Living Survey. Zurich and Auckland follow in second and third place, respectively, and Munich is in fourth place, followed by Vancouver, which ranked fifth. Düsseldorf dropped one spot to rank sixth followed by Frankfurt in seventh, Geneva in eighth, Copenhagen in ninth, and Bern and Sydney tied for tenth place."
"Globally, the cities with the lowest quality of living are Khartoum, Sudan (217); N’Djamena, Chad (218); Port-au-Prince, Haiti (219); and Bangui, Central African Republic (220). Baghdad, Iraq (221) ranks last."