The Group of Twenty (G20) is an informal gathering of the worlds largest economies that meets regularly to coordinate global policy on trade, health, climate, and other issues. The G20 comprises 19 countries with some of the worlds largest economies, as well as the European Union (EU) . The countries are Argentina, Australia, Brazil, Canada, China, France, Germany, India, Indonesia, Italy, Japan, Mexico, Russia, Saudi Arabia, South Africa, South Korea, Turkey, the United Kingdom (UK), and the United States. The G20 was formed in 1999, in the wake of the Asian financial crisis, to unite finance ministers and central bankers from twenty of the world’s largest established and emerging economies. A decade later, at the height of the global economic crisis, the G20 was elevated to include heads of state and government. The G20 Summit is held annually, under the leadership of a rotating Presidency. The G20 initially focused largely on broad macroeconomic issues, but it has since expanded its agenda to include trade, sustainable development, health, agriculture, energy, environment, climate change, and anti-corruption. The G20 is not a permanent institution with a headquarters, offices, or staff. The G20 is a self-appointed group, and its composition is determined by the major countries and powers.