Quarter	Percentage of GDP
2001-10-01	56.9
2002-01-01	57.0
2002-04-01	58.0
2002-07-01	58.7
2002-10-01	58.7
2003-01-01	58.4
2003-04-01	58.9
2003-07-01	59.1
2003-10-01	58.9
2004-01-01	60.6
2004-04-01	60.8
2004-07-01	60.2
2004-10-01	59.7
2005-01-01	59.8
2005-04-01	59.0
2005-07-01	58.2
2005-10-01	57.9
2006-01-01	57.4
2006-04-01	56.6
2006-07-01	55.9
2006-10-01	55.3
2007-01-01	54.9
2007-04-01	54.5
2007-07-01	54.1
2007-10-01	53.6
2008-01-01	52.8
2008-04-01	52.6
2008-07-01	53.1
2008-10-01	55.6
2009-01-01	57.7
2009-04-01	60.1
2009-07-01	62.2
2009-10-01	63.4
2010-01-01	63.7
2010-04-01	64.4
2010-07-01	64.7
2010-10-01	65.5
2011-01-01	65.2
2011-04-01	65.3
2011-07-01	65.8
2011-10-01	66.4
2012-01-01	66.5
2012-04-01	67.1
2012-07-01	67.2
2012-10-01	67.8
2013-01-01	68.2
2013-04-01	68.4
2013-07-01	68.3
2013-10-01	69.0
2014-01-01	68.9
2014-04-01	68.9
2014-07-01	68.9
2014-10-01	69.5
2015-01-01	69.3
2015-04-01	69.2
2015-07-01	69.4
2015-10-01	70.3
2016-01-01	70.6
2016-04-01	70.8
2016-07-01	71.0
2016-10-01	71.1
2017-01-01	70.8
2017-04-01	70.8
2017-07-01	70.9
2017-10-01	70.9
2018-01-01	71.2