After the fall of Berlin wall in 1989, the EEC entered a very dynamic phase has started for the EEC.

The Maastricht Treaty created the EU with the implementation of cooperation in both foreign policy and internal security.

Austria, Finland, and Sweden have joined the EU in 1995.

If they joined after 1995, you could say, "Austria, Finland, and Sweden have joined in the years since 1995".

In 2002, the Euro gowent into circulation, replacing the presentformer currency ofies of the 12 member states.

As the member states each had their own individual currency, (I'm assuming), it would be currencies here.

In mid-90s, the greatest enlargement of the EU took place byvia the joining of newly-created democracies leaving the Soviet Union.

In 2005 a draft EU Constitution, that would replacinge all the previous existing treaties, was rejected by two national referaendums and in 2007, the Treaty of Lisbon, which only amends the previous treaties, was signed.