Birth rate
As of 2017, Niger has the highest birth rate in the world with 49.443 per thousand people. 
Japan has one of the lowest birth rates in the world with 8 per thousand people.
While in Japan there are 126 million people and in Niger 21 million, both countries had around 1 million babies born in 2016.
Ageing of Europe
France overtook Ireland as the European Union member state with the highest birth-rate in 2007. Projected birth rates indicate that France will have the largest population in the EU by 2050, with 75 million citizens, overtaking Germany, but only the second largest in Europe, with the UK having a larger estimated population. In 2011, France was the only European Union member with a fertility rate at replacement level, with an average rate of 2.08 children per woman while Ireland's fertility rate declined to 2.01 children per woman, slightly below replacement level. This reason for an increase in children are due to the government family benefits that are provided to these families. They receive an allowance based off income and how many children they have in that household.