Year Sterling (millions) 1998-12-31 13 1999-12-31 29 2000-12-31 17 2001-12-31 10 2002-12-31 10 2003-12-31 8 2004-12-31 10 2005-12-31 13 2006-12-31 14 2007-12-31 20 2008-12-31 29 2009-12-31 30 2010-12-31 54 2011-12-31 46 2012-12-31 21