As stated by the Mercer international surveys for quality of life in cities around the world, Bucharest occupied the 94th place in 2001 and slipped lower, to the 108th place in 2009 and the 107th place in 2010. Compared to it, Vienna occupied number one worldwide in 2011 and 2009. Warsaw ranked 84th, Istanbul 112th, and neighbours Sofia 114th and Belgrade 136th (in the 2010 rankings).