Year Sterling (millions) 2011-12-31 9202 2012-12-31 7372 2013-12-31 7301 2014-12-31 7422 2015-12-31 7891 2016-12-31 9990 2017-12-31 10368 2018-12-31 11519 2019-12-31 11861 2020-12-31 12727 2021-12-31 13083 2022-12-31 12716 2023-12-31 13511