Year Sterling (millions) 1997-12-31 15951 1998-12-31 15001 1999-12-31 13608 2000-12-31 12834 2001-12-31 10533 2002-12-31 11452 2003-12-31 15187 2004-12-31 16394 2005-12-31 18998 2006-12-31 21977 2007-12-31 23086 2008-12-31 23269 2009-12-31 23444 2010-12-31 17265 2011-12-31 15604 2012-12-31 13618 2013-12-31 14233 2014-12-31 17040 2015-12-31 24862 2016-12-31 24816 2017-12-31 24947 2018-12-31 31450 2019-12-31 33428 2020-12-31 32079 2021-12-31 31851 2022-12-31 34318 2023-12-31 36228