Quarter Sterling (millions) 2004-03-31 86.7 2004-06-30 83.9 2004-09-30 86.1 2004-12-31 89.5 2005-03-31 89 2005-06-30 87.2 2005-09-30 90.7 2005-12-31 92.4 2006-03-31 92.7 2006-06-30 91 2006-09-30 91.2 2006-12-31 89.7 2007-03-31 88.3 2007-06-30 89.7 2007-09-30 91.4 2007-12-31 90.3 2008-03-31 89.8 2008-06-30 90.9 2008-09-30 87.9 2008-12-31 84.8 2009-03-31 84.6 2009-06-30 89.5 2009-09-30 92.7 2009-12-31 95.4 2010-03-31 96.2 2010-06-30 96.3 2010-09-30 94.2 2010-12-31 95.5 2011-03-31 95.7 2011-06-30 96.9 2011-09-30 97.2 2011-12-31 96.7 2012-03-31 96.8 2012-06-30 97.2 2012-09-30 98.1 2012-12-31 97.4 2013-03-31 97.5 2013-06-30 98.2 2013-09-30 97.9 2013-12-31 98.2 2014-03-31 98.5 2014-06-30 98.4 2014-09-30 98.2 2014-12-31 98.2 2015-03-31 97.4 2015-06-30 96 2015-09-30 95.8 2015-12-31 96.5