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In 1901, Australia adopted a federal constitution and became a self-governing dominion of the British Empire. Australian troops took part in both world wars. Since World War II Australia has been transformed by a massive immigration programme. Australia remains a constitutional monarchy with Queen Elizabeth II as head of state: a referendum to establish a republic was defeated in 1999.

Australia's comparative advantage in primary products is a reflection of the natural wealth of the Australian Continent and its small domestic market; 19 million people occupy a continent the size of the contiguous United States. The relative size of the manufacturing sector has been declining for several decades, and now accounts for just under 12 percent of GDP.

English is the main official and spoken language in Australia, although some of the surviving Aboriginal communities maintain their native languages. A considerable number of first and sometimes second-generation migrants are bilingual; languages such as Italian, Cantonese and Greek are spoken in many communities.

Emigration now also plays a role in changing Australian demographics. The term, Australian Diaspora, refers to the 850,000 Australian citizens who today live outside Australia. This phenomena is relatively new in Australia's history, estimated as having occurred over the last 40 years. Awareness of this demographic (almost 5% of the Australian population) is growing and supported by government initiates.

New Zealanders are granted Special Category Visas on arrival in Australia, which allow them to remain in Australia to live or work indefinitely. However, New Zealand citizens are excluded from government subsidised tertiary education or other advantages granted to Australian citizens and permanent residents. New rules in 2001 divided New Zealanders living in Australia into two categories: those who were resident in Australia before 2001, and those who arrived in Australia after 2001. Those who were resident before 2001 may claim unemployment benefits after two years residence, as is the norm for permanent residents of other nationalities. New Zealanders who have arrived in Australia after 2001 are not entitled to any unemployment benefits at all, as is the norm for people living in Australia only on work permits.

Darwin has a tropical climate with distinct wet and dry seasons. The dry season runs from May to September, in the coolest months of June and July daily temperature range is 19 to 30°C. In the Wet season is associated with tropical cyclones and monsoon rains, the majority of rainfall occurs between December and March, thunderstorms are common and humidity is regularly over 70 per cent.

Although Australia has scarcely more than two persons per square kilometer of total land area, this raw figure is highly misleading: most of the continent is desert or semi-desert and of no agricultural value. In consequence, Australia is one of the world's most urbanized countries: less than 15% of the population live in rural areas.

Australia's economic development was slow at first and based on the export of wool. This all changed with the discovery of gold in 1851 and mining has, overall, been the most important sector of the Australian economy. By the late 20th century, Australia had a prosperous Western-style mixed economy, with a per capita GDP on par with the four dominant Western European economies. In recent years, the Australian economy has been resilient in the face of global economic downturn, with steady growth. Rising output in the domestic economy has been offsetting the global slump, and business and consumer confidence remains robust. Australia's emphasis on reforms is another key factor behind the economy's strength. In the 1980s, the Labor Party, led by Prime Minister Bob Hawke and Treasurer Paul Keating, played a crucial role in modernizing Australia's economy.

Adelaide is the capital city of the Australian state of South Australia. It is a coastal city on the Southern Ocean and was named in honour of Queen Adelaide, the consort of King William IV. It is situated on the Fleurieu Peninsula overlooking the Gulf St. Vincent, bordered by the low lying Mt Lofty Ranges to the east giving the suburbs a roughly north-south rectangular layout. The population is 1,072,585 (census 2001). In terms of population, it is the fifth-largest of the Australian capital cities.