As the saying goes, people think about their personal lives when they are well-fed and warm. Accordingly, the number of newborns also increases.
This is also a good thing for Australia, as the proportion of native Australians is extremely important, and they are the cornerstone of maintaining Australia's rule.
Apart from integrating immigrants into the Australian nation, the only way for Australians to expand is to increase fertility.
The immigration of British people in Australia is the result of Duke Arthur's efforts in the United Kingdom. People's willingness to immigrate naturally increases when they do not repel Arthur.
It is a good thing for Australia that German immigration has surpassed the British Empire, largely due to William II's policy of appeasing Australia.
Since the aid treaty between the German Empire and Australia took effect, more than a hundred thousand Germans have immigrated to Australia, becoming permanent residents.