Quarter	Percentage of GDP
2001-10-01	173.6
2002-01-01	174.3
2002-04-01	176.7
2002-07-01	178.8
2002-10-01	179.4
2003-01-01	178.7
2003-04-01	180.3
2003-07-01	180.2
2003-10-01	179.9
2004-01-01	182.0
2004-04-01	181.2
2004-07-01	180.8
2004-10-01	181.2
2005-01-01	181.1
2005-04-01	181.3
2005-07-01	180.4
2005-10-01	180.4
2006-01-01	180.8
2006-04-01	180.4
2006-07-01	180.3
2006-10-01	180.1
2007-01-01	179.7
2007-04-01	179.9
2007-07-01	180.9
2007-10-01	181.6
2008-01-01	180.7
2008-04-01	179.9
2008-07-01	181.4
2008-10-01	186.3
2009-01-01	191.0
2009-04-01	195.2
2009-07-01	199.4
2009-10-01	200.3
2010-01-01	198.7
2010-04-01	199.8
2010-07-01	200.2
2010-10-01	199.6
2011-01-01	196.6
2011-04-01	196.9
2011-07-01	198.6
2011-10-01	200.0
2012-01-01	200.2
2012-04-01	202.1
2012-07-01	203.1
2012-10-01	204.8
2013-01-01	205.9
2013-04-01	206.1
2013-07-01	206.8
2013-10-01	207.1
2014-01-01	208.4
2014-04-01	209.5
2014-07-01	209.9
2014-10-01	212.5
2015-01-01	214.1
2015-04-01	213.3
2015-07-01	215.0
2015-10-01	217.3
2016-01-01	220.1
2016-04-01	221.9
2016-07-01	222.5
2016-10-01	221.3
2017-01-01	220.6
2017-04-01	220.3
2017-07-01	220.5
2017-10-01	220.2
2018-01-01	221.1