Sorry to burst any bubbles, but the world average makes no sense on this diagram.
Global average is 5.5", but China is 4.2". The US is at 5.0".
That means about 18% of the global population is 24% below average, and another 4% is 10% below average.
Indonesia is also about 20% below the average.
Unless nearly everyone lives in Congo, the math is way off.