Quarter	Percentage of GDP
1999-01-01	115.8
1999-04-01	117.8
1999-07-01	118.9
1999-10-01	121.3
2000-01-01	121.5
2000-04-01	122.5
2000-07-01	123.9
2000-10-01	126.4
2001-01-01	126.5
2001-04-01	127.5
2001-07-01	128.0
2001-10-01	130.4
2002-01-01	130.8
2002-04-01	131.3
2002-07-01	131.2
2002-10-01	132.4
2003-01-01	132.5
2003-04-01	133.7
2003-07-01	133.8
2003-10-01	135.0
2004-01-01	135.1
2004-04-01	136.0
2004-07-01	136.2
2004-10-01	137.8
2005-01-01	138.3
2005-04-01	140.6
2005-07-01	141.0
2005-10-01	142.2
2006-01-01	144.2
2006-04-01	145.8
2006-07-01	144.8
2006-10-01	145.6
2007-01-01	145.9
2007-04-01	148.0
2007-07-01	148.1
2007-10-01	151.3
2008-01-01	152.1
2008-04-01	153.6
2008-07-01	155.2
2008-10-01	156.8
2009-01-01	159.5
2009-04-01	162.0
2009-07-01	163.2
2009-10-01	164.9
2010-01-01	164.9
2010-04-01	165.3
2010-07-01	164.3
2010-10-01	164.8
2011-01-01	163.5
2011-04-01	164.0
2011-07-01	163.9
2011-10-01	166.7
2012-01-01	167.6
2012-04-01	168.7
2012-07-01	168.7
2012-10-01	167.5
2013-01-01	167.1
2013-04-01	166.5
2013-07-01	165.7
2013-10-01	164.2
2014-01-01	163.8
2014-04-01	164.0
2014-07-01	163.7
2014-10-01	164.8
2015-01-01	169.2
2015-04-01	167.2
2015-07-01	166.5
2015-10-01	165.2
2016-01-01	165.0
2016-04-01	165.6
2016-07-01	165.0
2016-10-01	165.2
2017-01-01	165.4
2017-04-01	163.9
2017-07-01	162.4
2017-10-01	161.5
2018-01-01	161.6