Year Sterling (millions) 1997-12-31 6409 1998-12-31 6941 1999-12-31 7407 2000-12-31 7648 2001-12-31 7411 2002-12-31 7751 2003-12-31 7967 2004-12-31 8179 2005-12-31 9218 2006-12-31 9375 2007-12-31 9592 2008-12-31 10139 2009-12-31 10673 2010-12-31 11180 2011-12-31 11743 2012-12-31 13004 2013-12-31 14243 2014-12-31 15684 2015-12-31 17539 2016-12-31 17591 2017-12-31 18095 2018-12-31 18611 2019-12-31 18555 2020-12-31 19115 2021-12-31 18636 2022-12-31 17948 2023-12-31 17576