In Gaza, as I note in my book, the median age of the population is 15.8 years.That's pretty amazing.
You got me started...
World : 0-14 years: 28.2%
Afghanistan : 17.5 years
Egypt : 23.4 years
Indonesia : 26.1 years
Iran : 24.8 years
Iraq : 19 years
Kuwait : 25.9 years
Lebanon : 26.9 years
Pakistan : 19.4 years
Syria : 20 years
Qatar : 31.4 years
Saudi Arabia : 21.2 years
Turkey : 27.3 years
United Arab Emirates : 27.7 years
Yemen : 16.5 years
Israel : 29.2 years
Australia : 36.3 years
Canada : 38.2 years
France : 38.6 years
Germany : 41.7 years
Italy : 41.4 years
Spain : 39.1 years
United Kingdom : 38.7 years
United States : 36 years
China : 31.8 years
El Salvador : 21.4 years
Honduras : 19 years
India : 24.4 years
Japan : 42.3 years
Korea, North : 31.4 years
Korea, South : 33.7 years
Mexico : 24.6 years
http://geography.about.com/library/cia/blcindex.htm
They breed like rabbits out in Gaza.