It's no secret that the United States is the wealthiest country in the world, with a GDP vastly exceeding most countries and well ahead of China, the second largest GDP in the world. The United States is a key financial center, is bestowed with considerable mineral and energy resources, features some of the most productive agriculture in the world, and still maintains a strong manufacturing base.
As such, it shouldn't come as much surprise that the United States is the nation with the most billionaires in the world.
However, the degree to which this is true, particularly when judged against America's population, is fairly impressive. China, while having a population more than 4.25 times as large as the United States, has less than one third as many billionaires living within its borders. It's an impressive accumulation of wealth among one nation's elite.
But more impressive than Hong Kong? While its 64 billionaires makes it seventh on this particular list, it's billionaires per capita is fairly absurd. With just over 7 million people living in the city, Hong Kong can boast a billionaire for every 110,000 people, give or take. Compare that to the United States, where it's a little less than 1 in every 650,000.
Either way, this infographic from graphs.net does an excellent job of breaking down billionaires and proportional population of each of these countries.