Quarter Sterling (millions) 2004-03-31 17 2004-06-30 17.4 2004-09-30 18.1 2004-12-31 17.8 2005-03-31 17.4 2005-06-30 16.9 2005-09-30 16.4 2005-12-31 16.4 2006-03-31 15.9 2006-06-30 15.9 2006-09-30 16.3 2006-12-31 16.3 2007-03-31 17.5 2007-06-30 19.8 2007-09-30 21 2007-12-31 24.1 2008-03-31 25.5 2008-06-30 26.4 2008-09-30 26.6 2008-12-31 32 2009-03-31 32.3 2009-06-30 34.5 2009-09-30 36.9 2009-12-31 39.5 2010-03-31 43.3 2010-06-30 41.2 2010-09-30 41 2010-12-31 41.2 2011-03-31 42.4 2011-06-30 43.7 2011-09-30 45 2011-12-31 45.6 2012-03-31 46.8 2012-06-30 48.5 2012-09-30 48.7 2012-12-31 48.2 2013-03-31 47.7 2013-06-30 49.7 2013-09-30 50 2013-12-31 48.8 2014-03-31 46.7 2014-06-30 45.4 2014-09-30 42.9 2014-12-31 42.8 2015-03-31 43.4 2015-06-30 44.2 2015-09-30 44.7 2015-12-31 46.1 2016-03-31 45.2 2016-06-30 44.9 2016-09-30 42.8 2016-12-31 42.9 2017-03-31 43 2017-06-30 42.3 2017-09-30 41.3 2017-12-31 40.9 2018-03-31 40.8 2018-06-30 40.2 2018-09-30 36.5 2018-12-31 37.3 2019-03-31 38.7 2019-06-30 40.5 2019-09-30 40.7 2019-12-31 39.8 2020-03-31 39.5 2020-06-30 38.7 2020-09-30 37.2 2020-12-31 36.9 2021-03-31 36.6 2021-06-30 38.6 2021-09-30 37.8 2021-12-31 38.6 2022-03-31 36.9 2022-06-30 39.4 2022-09-30 40.9 2022-12-31 37.7 2023-03-31 36.8 2023-06-30 35.9 2023-09-30 36 2023-12-31 36.4