Year Sterling (millions) 1998-12-31 11 1999-12-31 13 2000-12-31 15 2001-12-31 12 2002-12-31 17 2003-12-31 15 2004-12-31 11 2005-12-31 16 2006-12-31 13 2007-12-31 13 2008-12-31 14 2009-12-31 18 2010-12-31 15 2011-12-31 13 2012-12-31 14