The following is a map of European countries by the percentage of the population which is between 0 and 14.
This is one of the lowest rates in the world, compared with the average of 25%.
Europe and Central Asia are tied for the lowers share of people 0-14 with North America, likely due to the high GDP of countries in those regions.
The map data are for the year 2022 from the World Bank.
The table data are for the year 2022 from the World Bank.