Quarter Sterling (millions) 2004-03-31 56.3 2004-06-30 56.1 2004-09-30 55.9 2004-12-31 57.2 2005-03-31 58.3 2005-06-30 59.5 2005-09-30 60.3 2005-12-31 61.6 2006-03-31 63 2006-06-30 64.2 2006-09-30 64.5 2006-12-31 65.7 2007-03-31 65.9 2007-06-30 64.1 2007-09-30 62.6 2007-12-31 62.9 2008-03-31 62.6 2008-06-30 62.9 2008-09-30 63.6 2008-12-31 57.8 2009-03-31 57.6 2009-06-30 54.2 2009-09-30 49.6 2009-12-31 43 2010-03-31 30.2 2010-06-30 28.4 2010-09-30 23.5 2010-12-31 21.1 2011-03-31 18.2 2011-06-30 16.7 2011-09-30 15.2 2011-12-31 15 2012-03-31 14.7 2012-06-30 14.4 2012-09-30 14.9 2012-12-31 15.6 2013-03-31 15.5 2013-06-30 14.1 2013-09-30 13 2013-12-31 13 2014-03-31 14 2014-06-30 15.3 2014-09-30 16.9 2014-12-31 23.5 2015-03-31 24.2 2015-06-30 24.1 2015-09-30 24.6 2015-12-31 24.2 2016-03-31 25.1 2016-06-30 25.9 2016-09-30 27.4 2016-12-31 27.3 2017-03-31 27.4 2017-06-30 28.5 2017-09-30 29.3 2017-12-31 29.6 2018-03-31 29.8 2018-06-30 30.5 2018-09-30 33 2018-12-31 32.8 2019-03-31 32.1 2019-06-30 31.1 2019-09-30 30.8 2019-12-31 31.1 2020-03-31 31.5 2020-06-30 32.4 2020-09-30 34 2020-12-31 34.3 2021-03-31 34.8 2021-06-30 34.8 2021-09-30 36.7 2021-12-31 36.4 2022-03-31 32.1 2022-06-30 32 2022-09-30 34.6 2022-12-31 41.8 2023-03-31 47.1 2023-06-30 48.3 2023-09-30 50.9 2023-12-31 52.7