By 2050, the top ten richest countries in the world are expected to be Singapore, Hong Kong, Taiwan, South Korea, the United States, Saudi Arabia, Canada, the United Kingdom, Switzerland, and Austria. These are the countries with the greatest GDP per capita, a measure of a country’s economic production. Colonialism, trade, and immigration are historical aspects that have contributed to these countries’ wealth. Singapore, for example, was a British colony until 1963 and has since developed into a successful city-state as a result of its strategic location and pro-business laws. Hong Kong was a British colony until 1997, when it became a worldwide financial centre. Taiwan and South Korea were both impoverished until the mid-twentieth century, but they have since developed into rich economies thanks to export-oriented manufacturing industries. The United States possesses the world’s greatest economy and has been a key worldwide force since World War II’s end. Saudi Arabia boasts the world’s greatest deposits of oil and gas, making it one of the world’s wealthiest countries. Canada is a prosperous country with a diverse economy, whereas the United Kingdom is a significant financial centre with a long history of colonial rule. Switzerland is an affluent country with a varied economy, whereas Austria is a prosperous country with a diverse economy.