Quarter Sterling (millions) 2004-03-31 37.7 2004-06-30 38.5 2004-09-30 40.2 2004-12-31 41 2005-03-31 41 2005-06-30 40.3 2005-09-30 39.6 2005-12-31 39.5 2006-03-31 38.5 2006-06-30 37.7 2006-09-30 38.6 2006-12-31 40 2007-03-31 40.8 2007-06-30 40.3 2007-09-30 41 2007-12-31 43.2 2008-03-31 44.5 2008-06-30 46.3 2008-09-30 48.8 2008-12-31 51.9 2009-03-31 52.1 2009-06-30 52.9 2009-09-30 54.7 2009-12-31 56.4 2010-03-31 60.9 2010-06-30 60.4 2010-09-30 59.2 2010-12-31 58.7 2011-03-31 55.3 2011-06-30 54.9 2011-09-30 55.8 2011-12-31 56.3 2012-03-31 56.8 2012-06-30 57.6 2012-09-30 58.5 2012-12-31 58.4 2013-03-31 58.2 2013-06-30 57.3 2013-09-30 56 2013-12-31 56.1 2014-03-31 55.7 2014-06-30 52.9 2014-09-30 50.1 2014-12-31 51.7 2015-03-31 51.6 2015-06-30 51.3 2015-09-30 51.2 2015-12-31 51.5 2016-03-31 50.4 2016-06-30 49.1 2016-09-30 47.9 2016-12-31 47.1 2017-03-31 46.6 2017-06-30 45.8 2017-09-30 45.1 2017-12-31 45.3 2018-03-31 44.9 2018-06-30 43.4 2018-09-30 41.2 2018-12-31 40.7 2019-03-31 40.6 2019-06-30 40.4 2019-09-30 39.2 2019-12-31 38.4 2020-03-31 38.3 2020-06-30 37.5 2020-09-30 37.2 2020-12-31 36.6 2021-03-31 35.6 2021-06-30 34.6 2021-09-30 33.2 2021-12-31 32.6 2022-03-31 34.4 2022-06-30 34.5 2022-09-30 36.4 2022-12-31 41.2 2023-03-31 47 2023-06-30 53.8 2023-09-30 59 2023-12-31 62.6