India
males age 16-49: 301,094,084
females age 16-49: 283,047,141 (2008 est.)
Indonesia
males age 16-49: 63,800,825
females age 16-49: 61,729,717 (2008 est.)
Iran
males age 16-49: 20,212,275
females age 16-49: 19,638,751 (2008 est.)
Iraq
males age 16-49: 7,086,200
females age 16-49: 6,808,954 (2008 est.)
Ireland
males age 16-49: 1,024,635
females age 16-49: 1,024,276 (2008 est.)
Israel
males age 16-49: 1,717,362
females age 16-49: 1,636,574 (2008 est.)
Italy
males age 16-49: 13,884,079
females age 16-49: 13,158,378 (2008 est.)
Jamaica
males age 16-49: 688,480
females age 16-49: 709,548 (2008 est.)
Japan
males age 16-49: 27,819,804
females age 16-49: 26,863,794 (2008 est.)
Jordan
males age 16-49: 1,812,551
females age 16-49: 1,559,155 (2008 est.)