15 staggering facts about Saudi Arabia

Saudi Arabia has been front and center over the past few months as oil prices plunged in late 2014 and then saw a mild recovery in 2015.

But it's worth taking a step back and looking at its unique economy as a whole and what that might mean for its future.

"The oil boom of the past decade has transformed Saudi Arabia into a major global economy with a young population and large wealth that offer great potential," writes HSBC economist Razan Nasser, "but with lower oil prices, the Kingdom's structural challenges are ever more pressing."

We've taken a closer look at some of the numbers behind Saudi Arabia young, oil-driven economy.