According to the 2012 census, 135,853 residents of the City of Paris were immigrants from , 112,369 were immigrants from the , 70,852 from and , 5,059 from , 91,297 from outside Turkey , 38,858 from the , and 1,365 from the.
The Paris region's 800 aerospace companies employed 100,000.
From then on, the new reservoir system became Paris's principal source of drinking water, and the remains of the old system, pumped into lower levels of the same reservoirs, were from then on used for the cleaning of Paris's streets.