Despite South Korea being just 1% of the geographic size of the United States, its population equals roughly 16% of U.S. population. In fact, Coupang says that 70% of South Korea's population lives within seven miles of one of its distribution centers. And South Korea's population also appears to be quite tech-savvy. According to Coupang, 96% of the population has a smartphone, versus 85% in the United States.