Year Sterling (millions) 1998-12-31 4 1999-12-31 2 2000-12-31 4 2001-12-31 5 2002-12-31 3 2003-12-31 4 2004-12-31 7 2005-12-31 10 2006-12-31 5 2007-12-31 7 2008-12-31 6 2009-12-31 4 2010-12-31 20 2011-12-31 6 2012-12-31 2