Year Sterling (millions) 1997-12-31 204 1998-12-31 3 1999-12-31 20 2000-12-31 200 2001-12-31 430 2002-12-31 0 2003-12-31 0 2004-12-31 0 2005-12-31 0 2006-12-31 2 2007-12-31 87 2008-12-31 51 2009-12-31 12