Year Sterling (millions) 1998-12-31 31 1999-12-31 55 2000-12-31 32 2001-12-31 29 2002-12-31 69 2003-12-31 33 2004-12-31 23 2005-12-31 51 2006-12-31 81 2007-12-31 80 2008-12-31 105 2009-12-31 262 2010-12-31 170 2011-12-31 172 2012-12-31 140