Quarter	Percentage of GDP
1997-10-01	129.4
1998-01-01	135.8
1998-04-01	133.8
1998-07-01	130.4
1998-10-01	130.5
1999-01-01	135.4
1999-04-01	135.3
1999-07-01	131.4
1999-10-01	137.1
2000-01-01	146.5
2000-04-01	152.2
2000-07-01	156.0
2000-10-01	160.2
2001-01-01	161.9
2001-04-01	161.2
2001-07-01	162.1
2001-10-01	169.7
2002-01-01	162.5
2002-04-01	164.6
2002-07-01	168.7
2002-10-01	174.0
2003-01-01	168.6
2003-04-01	171.4
2003-07-01	169.5
2003-10-01	171.3
2004-01-01	173.1
2004-04-01	176.3
2004-07-01	178.1
2004-10-01	181.2
2005-01-01	179.3
2005-04-01	189.3
2005-07-01	193.0
2005-10-01	195.5
2006-01-01	198.7
2006-04-01	197.2
2006-07-01	200.2
2006-10-01	201.5
2007-01-01	203.5
2007-04-01	201.2
2007-07-01	203.4
2007-10-01	207.4
2008-01-01	211.9
2008-04-01	212.3
2008-07-01	218.1
2008-10-01	221.8
2009-01-01	231.2
2009-04-01	238.7
2009-07-01	246.2
2009-10-01	241.3
2010-01-01	243.0
2010-04-01	234.2
2010-07-01	242.0
2010-10-01	245.6
2011-01-01	254.1
2011-04-01	250.1
2011-07-01	248.1
2011-10-01	230.5
2012-01-01	220.5
2012-04-01	238.5
2012-07-01	261.0
2012-10-01	282.8
2013-01-01	284.0
2013-04-01	293.0
2013-07-01	296.1
2013-10-01	300.4
2014-01-01	304.8
2014-04-01	309.1
2014-07-01	306.5
2014-10-01	301.7
2015-01-01	294.1
2015-04-01	292.2
2015-07-01	293.7
2015-10-01	299.9
2016-01-01	299.0
2016-04-01	303.0
2016-07-01	299.7
2016-10-01	303.3
2017-01-01	299.4
2017-04-01	296.8
2017-07-01	296.6
2017-10-01	301.3
2018-01-01	298.8