Quarter Sterling (millions), Seasonally adjusted 1997-09-30 16444 1997-12-31 15804 1998-03-31 15633 1998-06-30 15299 1998-09-30 15257 1998-12-31 15329 1999-03-31 15584 1999-06-30 16090 1999-09-30 16511 1999-12-31 17164 2000-03-31 16401 2000-06-30 16561 2000-09-30 16898 2000-12-31 17116 2001-03-31 17907 2001-06-30 17862 2001-09-30 17760 2001-12-31 18411 2002-03-31 18682 2002-06-30 18886 2002-09-30 19387 2002-12-31 16987 2003-03-31 16798 2003-06-30 17237 2003-09-30 18036 2003-12-31 19500 2004-03-31 19138 2004-06-30 20219 2004-09-30 20287 2004-12-31 20157 2005-03-31 21000 2005-06-30 20731 2005-09-30 20592 2005-12-31 21436 2006-03-31 21372 2006-06-30 20410 2006-09-30 21798 2006-12-31 21983 2007-03-31 22175 2007-06-30 22820 2007-09-30 21774 2007-12-31 26310 2008-03-31 32801 2008-06-30 33063 2008-09-30 48267 2008-12-31 44772 2009-03-31 58376 2009-06-30 61297 2009-09-30 68108 2009-12-31 81380 2010-03-31 77810 2010-06-30 77491 2010-09-30 78867 2010-12-31 105774 2011-03-31 109320 2011-06-30 107265 2011-09-30 109931 2011-12-31 111364 2012-03-31 115188 2012-06-30 114627 2012-09-30 116154 2012-12-31 119000 2013-03-31 120335 2013-06-30 122931 2013-09-30 128801 2013-12-31 131057 2014-03-31 137870 2014-06-30 140841 2014-09-30 143757 2014-12-31 146824 2015-03-31 152038 2015-06-30 156506 2015-09-30 160228 2015-12-31 167805 2016-03-31 171240 2016-06-30 163661 2016-09-30 167448 2016-12-31 174571 2017-03-31 180412 2017-06-30 182392 2017-09-30 186255 2017-12-31 188608 2018-03-31 158073 2018-06-30 163272 2018-09-30 165083 2018-12-31 170466 2019-03-31 169378 2019-06-30 171430 2019-09-30 175721 2019-12-31 180294