How is "They also made a significant contribution to extending the area which enjoyed economic growth between 2004 and 2007, as well as to reducing the gap between the countries of the old and the new Europe." said in German?

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Sie haben ferner einen bedeutenden Beitrag zur Ausweitung des Raumes, der zwischen 2004 und 2007 ein Wirtschaftswachstum verzeichnet hat, sowie zur Reduzierung der Kluft zwischen den Ländern des alten und des neuen Europas geleistet.