Quarter Sterling (millions) 2004-03-31 75 2004-06-30 74.6 2004-09-30 72.4 2004-12-31 70.4 2005-03-31 70.1 2005-06-30 69 2005-09-30 67.7 2005-12-31 64.4 2006-03-31 61.3 2006-06-30 58.8 2006-09-30 57.2 2006-12-31 56.4 2007-03-31 54.4 2007-06-30 52.1 2007-09-30 50.4 2007-12-31 53 2008-03-31 54.6 2008-06-30 55.9 2008-09-30 56.3 2008-12-31 56.1 2009-03-31 59 2009-06-30 60.3 2009-09-30 62 2009-12-31 63.7 2010-03-31 63.9 2010-06-30 65.3 2010-09-30 66.3 2010-12-31 67.1 2011-03-31 67.5 2011-06-30 68.3 2011-09-30 69.8 2011-12-31 70.7 2012-03-31 70.6 2012-06-30 70.5 2012-09-30 71 2012-12-31 70.9 2013-03-31 70.3 2013-06-30 69.7 2013-09-30 68.6 2013-12-31 66.6 2014-03-31 64.3 2014-06-30 61.8 2014-09-30 60 2014-12-31 57.9 2015-03-31 56.2 2015-06-30 54.5 2015-09-30 52.4 2015-12-31 50.8 2016-03-31 49.9 2016-06-30 48.2 2016-09-30 47 2016-12-31 45.8 2017-03-31 44.2 2017-06-30 42.4 2017-09-30 40.6 2017-12-31 38.6 2018-03-31 36.6 2018-06-30 35 2018-09-30 33.4 2018-12-31 31.6 2019-03-31 29.9 2019-06-30 28.7 2019-09-30 27.5 2019-12-31 26.3 2020-03-31 25.1 2020-06-30 24.4 2020-09-30 23.8 2020-12-31 23 2021-03-31 21.8 2021-06-30 20.6 2021-09-30 19.5 2021-12-31 18.5 2022-03-31 17.3 2022-06-30 16 2022-09-30 14.6 2022-12-31 13.1 2023-03-31 12.8 2023-06-30 12.8 2023-09-30 12.4 2023-12-31 12.4