Regarding ages of refugee migration in Germany, all refugees together tend to be male and young, syrians are "currently" among the "oldest" although much younger than german average, africans are the youngest (that might explain why France is receiving younger refugees), and balcan refugees (most of them with little chance of staying for long term) tend to migrate with large families and childrens.
Refugees alone will not solve demographics problems in germany, not from one day to another, they will hopefully rejuvenate society for a few years or decades, and give Germany more time to stabilize its fertility to a normal level. The age cohort 18-45, which is still by far larger in Germany compared to France, is also very important for future potential fertility.
Another fact to take into consideration, while current migrants to Germany from the middle east are mostly male and adults, they will bring their childrens and wives once they get their asylum approved, we might expect younger and more female middle east migrants in the coming years considering they are at present the majority of the huge refugees waves and the ones with the highest chances of asylum approval
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More than half of refugees is younger than 25
Asylum seekers according to age and sex in 2014
