Answer:
North Macedonia, Albania, Serbia, Romania, and Bulgaria.
Explanation:
There are a lot of countries in the world where people in the age group of 24 to 40 would mostly want to migrate to other countries. A region that is in this kind of situation is the Balkan, and while in most of the countries this is the case, the situation is most dramatic in North Macedonia, Albania, Serbia, Romania, and especially Bulgaria.
It is not a small difference when it comes to people wanting to remain and people wanting to move, but it is in the range of 70,80, and even 90% of the people of this age group that say that they would prefer to migrate in another country. There are a lot of reasons for this, and some of them are politics, corruption on every level of the society, in order to get a job you usually need to be a member of the leading political party or to have a very good connection while your skills and qualities are often not taken in consideration, the economies are not at a good level, the living standard is low for European standards, and the pollution is among the highest int he world. All of this has led to the rapid loss of population of this age group in these countries, which in turn has led to a rapidly aging population and much lower birthrates. Bulgaria has it the worst and it is the country that has lost the biggest percentage of the population through migration in the last few decades.
