In recent decades Australia’s foreign relations have been driven by a close association with the United States, through the ANZUS pact, and developing relationships with Asia through regional bodies such as the ASEAN Regional Forum, and the South Pacific through the Pacific Islands Forum. It maintains ties to the Commonwealth of Nations by way of the Commonwealth Heads of Government. Much of Australia’s diplomatic energy is focused on international trade liberalisation. Australia led the formation the Cairns Group and APEC, and is a member of the OECD and the WTO. Australia has also initiated many bilateral free trade agreements, the most recent being the U.S.-Australia Free Trade Agreement. Australia is a founding member of the United Nations and maintains an international aid program, under which some 60 countries receive assistance. The 2005–06 budget provides $2.5 billion for development assistance[7], as a percentage of GDP this contribution is below that suggested as a UN Millennium Development Goal.