The metropolitan area had a population of 1,770,742 in 2010 according to citypopulation.de,The Principal Agglomerations of the World – Population Statistics and Maps – citypopulation.de 2,300,000 in 2015 according to the Organization for Economic Cooperation and Development,Organization for Economic Cooperation and Development, Competitive Cities in the Global Economy , OECD Territorial Reviews, (OECD Publishing, 2006), Table 1.1 2,513,965 in 2017 according to the World Gazetteer, – World Gazetteer, 2017 and 2,522,383 in 2017 according to Eurostat."Population by sex and age groups" – Eurostat, 2017.
The metropolitan area had a population of 1,770,742 in 2010 according to citypopulation.de,The Principal Agglomerations of the World – Population Statistics and Maps – citypopulation.de 2,300,000 in 2015 according to the Organization for Economic Cooperation and Development,Organization for Economic Cooperation and Development, Competitive Cities in the Global Economy , OECD Territorial Reviews, (OECD Publishing, 2006), Table 1.1 2,513,965 in 2017 according to the World Gazetteer – World Gazetteer, 2017 and 2,522,383 in 2017 according to Eurostat."Population by sex and age groups" – Eurostat, 2017