CD , ▁the ▁largest ▁con urb ations ▁are : ▁ ▁Milan ▁– ▁ 7 . 4   mill ion ▁ ▁Rome ▁– ▁ 3 . 7   mill ion ▁ ▁Nap les ▁– ▁ 3 . 1   mill ion ▁ ▁Tur in ▁– ▁ 2 . 2   mill ion ▁ ▁Gen et ics ▁and ▁eth nic ▁groups ▁ ▁Modern ▁Italy ▁and ▁imm igration ▁ ▁Italy ▁used ▁to ▁be ▁a ▁country ▁of ▁mass ▁em igration ▁from ▁the ▁late ▁ 1 9 th ▁century ▁until ▁the ▁ 1 9 7 0 s . ▁Between ▁ 1 8 9 8 ▁and ▁ 1 9 1 4 , ▁the ▁peak ▁years ▁of ▁Italian ▁di as por a , ▁approximately ▁ 7 5 0 , 0 0 0 ▁It ali ans ▁em igr ated ▁each ▁year . ▁Italian ▁communities ▁once ▁th riv ed ▁in ▁the ▁former ▁African ▁colon ies ▁of ▁E rit rea ▁( near ly ▁ 1 0 0 , 0 0 0 ▁at ▁the ▁beginning ▁of ▁World ▁War ▁II ), ▁Som alia ▁and ▁Lib ya ▁( 1 5 0 , 0 0 0 ▁It ali ans ▁settled ▁in ▁Lib ya , ▁const itut ing ▁about ▁ 1 8 % ▁of ▁the ▁total ▁Lib yan ▁population ). ▁All ▁of ▁Lib ya ' s ▁It ali ans ▁were ▁exp elled ▁from ▁the ▁North ▁African ▁country ▁in ▁ 1 9 7 0 . ▁In ▁addition , ▁after ▁the ▁an nex ation ▁of ▁Ist ria ▁in ▁ 1 9 4 5 , ▁up ▁to ▁ 3 5 0