Year Sterling (millions) 1997-12-31 0 1998-12-31 0 1999-12-31 0 2000-12-31 0 2001-12-31 0 2002-12-31 0 2003-12-31 0 2004-12-31 0 2005-12-31 1 2006-12-31 1 2007-12-31 0 2008-12-31 0 2009-12-31 0 2010-12-31 0 2011-12-31 0 2012-12-31 0 2013-12-31 0 2014-12-31 0 2015-12-31 0 2016-12-31 0 2017-12-31 0 2018-12-31 0 2019-12-31 0 2020-12-31 0 2021-12-31 0 2022-12-31 0 2023-12-31 0