Culturally speaking, they are aborting themselves out of existence. That and they're just not having children, or having them very late in life. They have an extremely low birthrate so there are less and less children supporting more and more elderly. When the elderly begin dying off the fact that they haven't had children will begin to weigh very heavily. Growing populations, such as the Arabs and the Turks, will grow rapidly in numbers and influence. This is only a matter of decades away from happening actually.