Year Sterling (millions) 1998-12-31 10 1999-12-31 14 2000-12-31 14 2001-12-31 10 2002-12-31 15 2003-12-31 19 2004-12-31 6 2005-12-31 19 2006-12-31 12 2007-12-31 11 2008-12-31 17 2009-12-31 14 2010-12-31 18 2011-12-31 15 2012-12-31 24