[A graph about fertility]
Do you even know what's "fertility rate" and "birth rate" mean ?
They are two totally different things. The birth rate will continue to raise whatever the evolution of the fertility rate. The later need to pass below 2 for the birth rate to stop growing.
In 1950, there were 1.000 women that gave birth to 7 children, the birth rate was of 7000.
Half of them being female, one generation later, in 1975, they were 3.500 women to gave birth to 7 children. While the fertility rate was stable, the birth rate, it, was raising to 24 500.
Half of those children being female once again, one more generation later, in 2000, it's 12.250 women who gave birth to 5 children. Despite the fertility rate being lower than before, the birth rate was higher than never, with 61.250 newborns.
Like life is more complicated than this, the births are spread over time, which lead to a progression curve more arithmetical than the geometrical representation above, but the principle stay the same.
As side note, the fertility rate isn't the only thing lowering in Africa, it's the same for the infantile death rate, at 10% in 2011 against 16% in 1990 for Sub-Saharan Africa (source:
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), which is where the infantile death rate is the higher in the world.
But even if it was stable, it would have changed nothing, since it would have applied for the previous births. The progression of the birth rate would just be slower, since less women would reach the age where they can give birth themselves. But it will still be progressing despite the lower fertility rate.
But, what all this have to do with the fact that, apparently, more Europeans works as independent adult game maker, than Americans do ?