Year Sterling (millions) 1997-12-31 15966 1998-12-31 19959 1999-12-31 21257 2000-12-31 22933 2001-12-31 22281 2002-12-31 20497 2003-12-31 24423 2004-12-31 25339 2005-12-31 27554 2006-12-31 31340 2007-12-31 37554 2008-12-31 30248 2009-12-31 23188 2010-12-31 21146 2011-12-31 31359 2012-12-31 25426 2013-12-31 27871 2014-12-31 24310 2015-12-31 21605 2016-12-31 33051 2017-12-31 40736 2018-12-31 44254 2019-12-31 49077 2020-12-31 56547 2021-12-31 45315 2022-12-31 47749 2023-12-31 42466