Year Sterling (millions) 2011-12-31 939 2012-12-31 1115 2013-12-31 1336 2014-12-31 1416 2015-12-31 1578 2016-12-31 1633 2017-12-31 1905 2018-12-31 2337 2019-12-31 2067 2020-12-31 2539 2021-12-31 3004 2022-12-31 3343 2023-12-31 3044