Quarter Sterling (millions) 2007-12-31 33 2008-03-31 24 2008-06-30 29 2008-09-30 37 2008-12-31 22 2009-03-31 61 2009-06-30 21 2009-09-30 31 2009-12-31 46 2010-03-31 27 2010-06-30 31 2010-09-30 51 2010-12-31 81 2011-03-31 31 2011-06-30 43 2011-09-30 33 2011-12-31 46 2012-03-31 72 2012-06-30 33 2012-09-30 54 2012-12-31 57 2013-03-31 36 2013-06-30 26 2013-09-30 36 2013-12-31 49 2014-03-31 17 2014-06-30 12 2014-09-30 23 2014-12-31 71 2015-03-31 9 2015-06-30 13 2015-09-30 67 2015-12-31 26 2016-03-31 23 2016-06-30 37 2016-09-30 26 2016-12-31 30 2017-03-31 56 2017-06-30 13 2017-09-30 26 2017-12-31 7 2018-03-31 69 2018-06-30 19 2018-09-30 4 2018-12-31 11 2019-03-31 130 2019-06-30 138 2019-09-30 80 2019-12-31 173 2020-03-31 72 2020-06-30 79 2020-09-30 136 2020-12-31 91