Paris is the core of a built-up area that extends well beyond its limits: commonly referred to as the ''agglomération Parisienne'', and statistically as a ''unité urbaine'' (a measure of urban area), the Paris agglomeration's 2017 population of 10,784,830 made it the largest urban area in the European Union. City-influenced commuter activity reaches well beyond even this in a statistical ''aire urbaine'' de Paris ("urban area", but a statistical method comparable to a metropolitan area), that had a 2017 population of 12,628,266, a number 19% the population of France, and the largest metropolitan area in the Eurozone.