We have often has discussions about global demography here. Global population growth reached a peak of 88 million per annum and has since declined to 77 million per annum. The age structure of the world’s population combined with near universal decreases in birth rates has led demographers to predict a continued decrease in population growth for the next 50 years at least.
However there will be wobbles and bumps along the way and I predict that we will see a big one in the next couple of years because of the ending of the one child policy in the PRC. In reality about 2/3 of the population got exemptions already, and many women have been irreversibly sterilised as a means of contraception, and a lot of couples only wanted one child etc but even if say 2% of Chinese women of childbearing have a child next year that would otherwise not have been born, that is an extra 3 million babies, so we might see population growth at > 80 million per year, temporarily, for the first time since 1996.
Apart from the one-off hit there will probably be an upward tick in projects in the long term, somewhere in the range of hundreds of thousands per year.