Australia is a developed country and one of the wealthiest in the world, with the world's 12th-largest economy. In 2014 Australia had the world's fifth-highest per capita income. Australia's military expenditure is the world's 13th-largest.
The third largest country of the world, the United States of America is located in North America between Mexico and Canada.
It is distinct from the geographic center of the United States, which reflects the 1959 additions of the states of Alaska and Hawaii, which is located at a point northeast of Belle Fourche, South Dakota.