Quarter	Percentage of GDP
1999-01-01	136.0
1999-04-01	136.7
1999-07-01	137.4
1999-10-01	138.8
2000-01-01	139.9
2000-04-01	139.9
2000-07-01	140.4
2000-10-01	141.1
2001-01-01	141.7
2001-04-01	142.2
2001-07-01	143.1
2001-10-01	144.3
2002-01-01	145.0
2002-04-01	145.6
2002-07-01	145.8
2002-10-01	146.8
2003-01-01	147.0
2003-04-01	148.0
2003-07-01	148.0
2003-10-01	148.2
2004-01-01	149.2
2004-04-01	149.2
2004-07-01	149.2
2004-10-01	150.4
2005-01-01	151.9
2005-04-01	153.0
2005-07-01	153.5
2005-10-01	154.2
2006-01-01	156.5
2006-04-01	157.5
2006-07-01	157.9
2006-10-01	158.8
2007-01-01	160.1
2007-04-01	161.5
2007-07-01	162.6
2007-10-01	164.6
2008-01-01	165.5
2008-04-01	165.9
2008-07-01	167.1
2008-10-01	168.1
2009-01-01	169.4
2009-04-01	170.7
2009-07-01	171.9
2009-10-01	171.9
2010-01-01	171.3
2010-04-01	169.7
2010-07-01	168.1
2010-10-01	166.6
2011-01-01	166.1
2011-04-01	165.4
2011-07-01	164.7
2011-10-01	164.9
2012-01-01	165.4
2012-04-01	164.8
2012-07-01	164.7
2012-10-01	164.2
2013-01-01	164.1
2013-04-01	163.8
2013-07-01	163.3
2013-10-01	162.3
2014-01-01	162.1
2014-04-01	161.6
2014-07-01	161.3
2014-10-01	161.6
2015-01-01	163.1
2015-04-01	162.3
2015-07-01	162.3
2015-10-01	162.0
2016-01-01	162.7
2016-04-01	163.4
2016-07-01	164.0
2016-10-01	163.8
2017-01-01	164.3
2017-04-01	163.9
2017-07-01	163.4
2017-10-01	163.1
2018-01-01	163.1