Quarter	Percentage of GDP
1999-01-01	125.9
1999-04-01	125.1
1999-07-01	131.0
1999-10-01	132.2
2000-01-01	130.5
2000-04-01	129.2
2000-07-01	126.8
2000-10-01	128.7
2001-01-01	124.5
2001-04-01	125.9
2001-07-01	131.3
2001-10-01	129.5
2002-01-01	130.7
2002-04-01	139.4
2002-07-01	137.4
2002-10-01	140.5
2003-01-01	139.2
2003-04-01	140.3
2003-07-01	141.5
2003-10-01	143.6
2004-01-01	140.2
2004-04-01	136.7
2004-07-01	136.1
2004-10-01	142.4
2005-01-01	138.2
2005-04-01	134.1
2005-07-01	134.0
2005-10-01	133.8
2006-01-01	137.1
2006-04-01	141.2
2006-07-01	140.6
2006-10-01	142.4
2007-01-01	142.4
2007-04-01	143.5
2007-07-01	146.8
2007-10-01	147.6
2008-01-01	150.3
2008-04-01	146.7
2008-07-01	138.7
2008-10-01	138.4
2009-01-01	139.6
2009-04-01	150.6
2009-07-01	157.2
2009-10-01	153.7
2010-01-01	147.3
2010-04-01	142.2
2010-07-01	148.0
2010-10-01	146.8
2011-01-01	147.5
2011-04-01	145.9
2011-07-01	139.3
2011-10-01	138.2
2012-01-01	139.6
2012-04-01	138.4
2012-07-01	142.9
2012-10-01	142.8
2013-01-01	141.0
2013-04-01	141.2
2013-07-01	144.2
2013-10-01	144.4
2014-01-01	144.8
2014-04-01	146.1
2014-07-01	141.2
2014-10-01	139.7
2015-01-01	139.0
2015-04-01	144.4
2015-07-01	146.2
2015-10-01	148.2
2016-01-01	154.0
2016-04-01	154.4
2016-07-01	155.2
2016-10-01	149.7
2017-01-01	152.3
2017-04-01	155.4
2017-07-01	157.2
2017-10-01	157.3
2018-01-01	158.6