Quarter	Percentage of GDP
1998-10-01	258.1
1999-01-01	264.4
1999-04-01	262.4
1999-07-01	263.4
1999-10-01	258.9
2000-01-01	262.4
2000-04-01	261.1
2000-07-01	263.2
2000-10-01	262.6
2001-01-01	265.3
2001-04-01	266.9
2001-07-01	269.2
2001-10-01	267.4
2002-01-01	266.7
2002-04-01	265.8
2002-07-01	266.3
2002-10-01	263.6
2003-01-01	264.8
2003-04-01	268.0
2003-07-01	267.7
2003-10-01	264.6
2004-01-01	269.7
2004-04-01	267.2
2004-07-01	266.8
2004-10-01	263.4
2005-01-01	266.1
2005-04-01	267.2
2005-07-01	264.2
2005-10-01	260.0
2006-01-01	260.6
2006-04-01	258.4
2006-07-01	259.0
2006-10-01	254.6
2007-01-01	258.1
2007-04-01	258.3
2007-07-01	262.0
2007-10-01	259.5
2008-01-01	267.2
2008-04-01	269.1
2008-07-01	275.4
2008-10-01	288.2
2009-01-01	299.2
2009-04-01	304.9
2009-07-01	309.9
2009-10-01	308.3
2010-01-01	310.3
2010-04-01	309.5
2010-07-01	303.5
2010-10-01	293.8
2011-01-01	296.8
2011-04-01	300.3
2011-07-01	303.9
2011-10-01	306.1
2012-01-01	312.3
2012-04-01	317.4
2012-07-01	319.8
2012-10-01	321.7
2013-01-01	331.1
2013-04-01	330.5
2013-07-01	325.4
2013-10-01	320.5
2014-01-01	326.6
2014-04-01	330.7
2014-07-01	333.9
2014-10-01	334.6
2015-01-01	344.6
2015-04-01	332.8
2015-07-01	344.4
2015-10-01	337.3
2016-01-01	351.5
2016-04-01	354.3
2016-07-01	350.9
2016-10-01	350.4
2017-01-01	348.8
2017-04-01	343.6
2017-07-01	339.3
2017-10-01	336.1
2018-01-01	337.6