Year Sterling (millions) 2011-12-31 6292 2012-12-31 6266 2013-12-31 6763 2014-12-31 6885 2015-12-31 7941 2016-12-31 8616 2017-12-31 9820 2018-12-31 10184 2019-12-31 10853 2020-12-31 12781 2021-12-31 13781 2022-12-31 13114 2023-12-31 11774