Year Sterling (millions) 1997-12-31 20 1998-12-31 32 1999-12-31 200 2000-12-31 36 2001-12-31 0 2002-12-31 107 2003-12-31 170 2004-12-31 62 2005-12-31 345 2006-12-31 0 2007-12-31 175 2008-12-31 50 2009-12-31 1000