Year Sterling (millions) 1997-12-31 30 1998-12-31 12 1999-12-31 14 2000-12-31 0 2001-12-31 158 2002-12-31 190 2003-12-31 433 2004-12-31 275 2005-12-31 266 2006-12-31 106 2007-12-31 89 2008-12-31 29 2009-12-31 29 2010-12-31 57 2011-12-31 109 2012-12-31 63 2013-12-31 66 2014-12-31 21 2015-12-31 51 2016-12-31 160 2017-12-31 124 2018-12-31 279 2019-12-31 374 2020-12-31 435 2021-12-31 253 2022-12-31 92 2023-12-31 40