According to the CIA World Factbook, a staggering 38pc of people in Saudi Arabia are under the age of 14, compared with just 16.5pc in the UK. This difference in demographics between the region and the West is why the population is rising faster. In the UK, the population growth rate is just 0.28pc, compared with 3.56pc in the United Arab Emirates, 3.5pc in Kuwait and 2.71pc in Yemen.