Year Sterling (millions) 1998-12-31 5 1999-12-31 4 2000-12-31 15 2001-12-31 4 2002-12-31 5 2003-12-31 4 2004-12-31 4 2005-12-31 8 2006-12-31 4 2007-12-31 20 2008-12-31 12 2009-12-31 8 2010-12-31 10 2011-12-31 11 2012-12-31 6