Year Sterling (millions) 2011-12-31 1635 2012-12-31 1927 2013-12-31 1985 2014-12-31 1855 2015-12-31 2125 2016-12-31 2323 2017-12-31 2273 2018-12-31 2834 2019-12-31 2728 2020-12-31 3453 2021-12-31 3031 2022-12-31 2883 2023-12-31 3186