The chart below shows total annual growth (in millions) among the 20 to 60-year-old global population. Global annual growth of working age adults peaked in 2007. Since then, annual working age population growth has been decelerating, and by 2030 will be less than half the peak annual growth.
https://econimica.blogspot.com/2020/02/global-demographic-fact-vs-central-bank_27.html