Throughout history, migration has shaped the ethnic and cultural diversity of Australia's resident population. Every year more people immigrate to, than emigrate from, Australia, thereby adding to the ever changing mosaic of Australia's diverse population.
At 30 June 2009, of the estimated resident population (ERP) of Australia (22.0 million people) one quarter were born overseas (5.8 million people). This continues the historical trend of a high proportion of overseas-born among Australia's population. People born in the United Kingdom were the largest group of overseas-born Australian residents (1.2 million persons at 30 June 2009), followed by those born in New Zealand (529,200), China (351,000), India (308,500) and Italy (219,300).