Saudi Arabia's population growth curve has been staggering.

1960-1980: 4m to 10m people

1980-2015: 10m to 30m people

650% increase in 55 years.

UAE 11000%, Kuwait 1250%, Oman 570%, Qatar 4800% and Jordan 680% have seen similarly massive increases.

(UAE is difficult to calculate due to political changes, either way it's a lot)

Syria 410%, Yemen 400%, Iraq 360%, Pakistan 300%, and Iran 250% have boomed to a slightly lesser extent as well.

Population growth by comparison over that time:

Australia 135%, Canada 100%, US 77%, France 47%, Japan 38%, UK 23%, Italy 20%, Germany 10%

Kenya 450%, Sudan 420%, Tanzania 400%, DR Congo 350%, Ethiopia 330%, Somalia 290%, Nigeria 280%, South Africa 210%, Egypt 200%

Malaysia 280%, Philippines 275%, Bangladesh 200%, Nepal 200%, Indonesia 185%, India 180%, Vietnam 165%, Myanmar 165%, Thailand 150%, China 100%, South Korea 100%

Venezuela 300%, Ecuador 250%, Mexico 220%, Dominican Republic 215%, Peru 200%, Colombia 200%, Brazil 175%, Argentina 105%, Cuba 60%