Year Sterling (millions) 1998-12-31 1 1999-12-31 1 2000-12-31 1 2001-12-31 1 2002-12-31 1 2003-12-31 1 2004-12-31 1 2005-12-31 2 2006-12-31 3 2007-12-31 3 2008-12-31 3 2009-12-31 4 2010-12-31 4 2011-12-31 4 2012-12-31 3