Quarter	Percentage of GDP
1998-10-01	182.0
1999-01-01	181.7
1999-04-01	182.8
1999-07-01	183.3
1999-10-01	185.6
2000-01-01	185.0
2000-04-01	185.8
2000-07-01	185.8
2000-10-01	188.3
2001-01-01	187.7
2001-04-01	186.8
2001-07-01	187.4
2001-10-01	187.8
2002-01-01	187.6
2002-04-01	188.6
2002-07-01	190.9
2002-10-01	190.8
2003-01-01	193.3
2003-04-01	195.3
2003-07-01	194.7
2003-10-01	195.1
2004-01-01	195.6
2004-04-01	193.6
2004-07-01	193.9
2004-10-01	194.0
2005-01-01	193.8
2005-04-01	195.7
2005-07-01	195.8
2005-10-01	193.8
2006-01-01	193.5
2006-04-01	192.3
2006-07-01	192.4
2006-10-01	189.1
2007-01-01	186.2
2007-04-01	183.6
2007-07-01	181.1
2007-10-01	180.9
2008-01-01	180.2
2008-04-01	179.6
2008-07-01	180.1
2008-10-01	184.5
2009-01-01	188.2
2009-04-01	192.4
2009-07-01	194.5
2009-10-01	195.4
2010-01-01	194.9
2010-04-01	196.3
2010-07-01	195.6
2010-10-01	199.0
2011-01-01	192.8
2011-04-01	192.0
2011-07-01	194.7
2011-10-01	193.9
2012-01-01	194.5
2012-04-01	197.4
2012-07-01	196.7
2012-10-01	196.2
2013-01-01	195.7
2013-04-01	194.8
2013-07-01	192.4
2013-10-01	191.9
2014-01-01	190.6
2014-04-01	190.7
2014-07-01	189.7
2014-10-01	188.3
2015-01-01	190.4
2015-04-01	186.0
2015-07-01	185.2
2015-10-01	183.7
2016-01-01	184.9
2016-04-01	184.5
2016-07-01	184.1
2016-10-01	180.5
2017-01-01	179.8
2017-04-01	178.7
2017-07-01	177.9
2017-10-01	176.4
2018-01-01	174.0