Quarter Sterling (millions) 2004-03-31 62.3 2004-06-30 61.5 2004-09-30 59.8 2004-12-31 59 2005-03-31 59 2005-06-30 59.7 2005-09-30 60.4 2005-12-31 60.5 2006-03-31 61.5 2006-06-30 62.3 2006-09-30 61.4 2006-12-31 60 2007-03-31 59.2 2007-06-30 59.7 2007-09-30 59 2007-12-31 56.8 2008-03-31 55.5 2008-06-30 53.7 2008-09-30 51.2 2008-12-31 48.1 2009-03-31 47.9 2009-06-30 47.1 2009-09-30 45.3 2009-12-31 43.6 2010-03-31 39.1 2010-06-30 39.6 2010-09-30 40.8 2010-12-31 41.3 2011-03-31 44.7 2011-06-30 45.1 2011-09-30 44.2 2011-12-31 43.7 2012-03-31 43.2 2012-06-30 42.4 2012-09-30 41.5 2012-12-31 41.6 2013-03-31 41.8 2013-06-30 42.7 2013-09-30 44 2013-12-31 43.9 2014-03-31 44.3 2014-06-30 47.1 2014-09-30 49.9 2014-12-31 48.3 2015-03-31 48.4 2015-06-30 48.7 2015-09-30 48.8 2015-12-31 48.5 2016-03-31 49.6 2016-06-30 50.9 2016-09-30 52.1 2016-12-31 52.9 2017-03-31 53.4 2017-06-30 54.2 2017-09-30 54.9 2017-12-31 54.7 2018-03-31 55.1 2018-06-30 56.6 2018-09-30 58.8 2018-12-31 59.3 2019-03-31 59.4 2019-06-30 59.6 2019-09-30 60.8 2019-12-31 61.6 2020-03-31 61.7 2020-06-30 62.5 2020-09-30 62.8 2020-12-31 63.4 2021-03-31 64.4 2021-06-30 65.4 2021-09-30 66.8 2021-12-31 67.4 2022-03-31 65.6 2022-06-30 65.5 2022-09-30 63.6 2022-12-31 58.8 2023-03-31 53 2023-06-30 46.2 2023-09-30 41 2023-12-31 37.4