China topped the list, with 45.3% of retail sales taking place online. It was followed by the UK with a 35.9% share and South Korea with a 30.1% share. In addition to topping this list, China also has the largest e-commerce market in the world, having made $2.879 trillion this year. It is followed by the US with $1.050 trillion. This only makes up 15% of total retail sales, as US shoppers are quite reluctant to shift to online shopping.