Brussels-Luxembourg Station, which is underground. The complex, known as the "Espace Léopold" (or "Leopoldsruimte" in Dutch), has two main buildings: the Paul-Henri Spaak building and the Altiero Spinelli building, which cover . The complex is not the official seat of the Parliament with its work being split with Strasbourg (its official seat) and Luxembourg (its secretariat). However, the decision-making bodies of the Parliament, along with its committees and some of its plenary sessions, are held in Brussels to the extent that three-quarters of its activity take place in the city. The Parliament buildings were extended with the new D4 and D5 buildings being completed and occupied in 2007 and 2008. It is believed the complex now provides enough space for the Parliament with no major new building projects foreseen. Other institutions The European External Action Service (EEAS) has been based in the Triangle building since 1 December 2010. The EEAS's bodies related to the Common Security and Defence Policy (CSDP) are situated in the Kortenberg building. The Economic and Social Committee and the Committee of the Regions together occupy the Delors building, which is next to Leopold Park and used to be occupied by the Parliament. They also use the office building Bertha von Suttner. Both buildings were named in 2006. Brussels also hosts two additional EU agencies: the European Defence Agency (located on the /) and the Executive Agency for Competitiveness and Innovation (in Madou Plaza Tower in Saint-Josse-ten-Noode). There is also EUROCONTROL, a semi-EU air traffic control agency covering much of Europe and the Western European Union, which is a non-EU military organisation currently merging into the EU's CFSP, and is headquartered in Haren, on the north-eastern perimeter of the City of Brussels. Demography and economic impact The EU's presence in Brussels has created significant social and economic impact. , member of the Brussels' Parliament responsible for the city's external relations, goes as far to say the prosperity of Brussels "is a consequence of the European presence". As well as the institutions themselves, large companies are drawn to the city due to the EU's presence. In total, about 10% of the city has a connection to the international community. In terms of demographics, 46% of the population of Brussels is from outside Belgium; of this, half is from other EU member states. About 3/5 of European civil servants live in the Brussels-Capital Region with 63% in the municipalities