<human>:  I have a question about the Ageing population in Australia. What is the ageing population?
<bot>: The ageing population is the population of people over 65 years of age. In Australia, the ageing population is growing rapidly. In 2016, there were 1.7 million people over 65 years of age, and this number is expected to increase to 2.5 million by 2026.