Year Sterling (millions) 1997-12-31 230 1998-12-31 19 1999-12-31 96 2000-12-31 0 2001-12-31 57 2002-12-31 15 2003-12-31 0 2004-12-31 0 2005-12-31 0 2006-12-31 0 2007-12-31 0 2008-12-31 0 2009-12-31 0