There has been a fundamental change in thinking by demographers about the medium-term outlook for population growth in Australia.

In September, the Australian Bureau of Statistics published a medium projection that showed the nation adding 6.9 million residents over the 20 years to 2026.

Just two years earlier, the official outlook for this period was net growth of 3.7 million.

The extra 3.2 million residents materialised out of new trends and data flowing from the 2006 census and changes to migration policy that upped the net migration assumption.

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