Quarter	Percentage of GDP
1998-10-01	165.3
1999-01-01	170.1
1999-04-01	172.1
1999-07-01	171.8
1999-10-01	176.4
2000-01-01	179.3
2000-04-01	171.8
2000-07-01	170.1
2000-10-01	165.4
2001-01-01	163.5
2001-04-01	163.0
2001-07-01	161.6
2001-10-01	168.1
2002-01-01	167.2
2002-04-01	169.3
2002-07-01	169.9
2002-10-01	166.3
2003-01-01	160.3
2003-04-01	164.4
2003-07-01	167.6
2003-10-01	173.8
2004-01-01	174.2
2004-04-01	173.4
2004-07-01	181.5
2004-10-01	188.0
2005-01-01	187.6
2005-04-01	190.8
2005-07-01	199.4
2005-10-01	203.1
2006-01-01	216.3
2006-04-01	227.3
2006-07-01	231.3
2006-10-01	235.1
2007-01-01	239.6
2007-04-01	242.5
2007-07-01	252.8
2007-10-01	249.6
2008-01-01	268.4
2008-04-01	279.9
2008-07-01	300.3
2008-10-01	325.7
2009-01-01	341.6
2009-04-01	353.2
2009-07-01	368.0
2009-10-01	381.9
2010-01-01	403.4
2010-04-01	403.3
2010-07-01	398.7
2010-10-01	397.2
2011-01-01	403.6
2011-04-01	399.7
2011-07-01	431.9
2011-10-01	432.2
2012-01-01	436.7
2012-04-01	445.6
2012-07-01	452.0
2012-10-01	439.4
2013-01-01	438.4
2013-04-01	427.6
2013-07-01	421.8
2013-10-01	424.0
2014-01-01	419.2
2014-04-01	416.6
2014-07-01	414.1
2014-10-01	417.6
2015-01-01	506.5
2015-04-01	461.7
2015-07-01	428.3
2015-10-01	409.5
2016-01-01	408.1
2016-04-01	404.2
2016-07-01	387.4
2016-10-01	382.2
2017-01-01	372.0
2017-04-01	358.9
2017-07-01	345.0
2017-10-01	331.7
2018-01-01	316.4