Year Sterling (millions) 2011-12-31 16238 2012-12-31 13058 2013-12-31 12678 2014-12-31 11988 2015-12-31 12142 2016-12-31 10801 2017-12-31 11606 2018-12-31 12177 2019-12-31 12884 2020-12-31 18004 2021-12-31 16645 2022-12-31 14850 2023-12-31 13612