Year Sterling (millions) 1998-12-31 15 1999-12-31 3 2000-12-31 0 2001-12-31 39 2002-12-31 39 2003-12-31 18 2004-12-31 64 2005-12-31 127 2006-12-31 152 2007-12-31 196 2008-12-31 336 2009-12-31 168 2010-12-31 218 2011-12-31 198 2012-12-31 156