Year Sterling (millions) 2011-12-31 5771 2012-12-31 4465 2013-12-31 4006 2014-12-31 3689 2015-12-31 3939 2016-12-31 4657 2017-12-31 4991 2018-12-31 5402 2019-12-31 5615 2020-12-31 5646 2021-12-31 5613 2022-12-31 5566 2023-12-31 6126