Quarter	Percentage of GDP
2001-10-01	20.1
2002-01-01	18.4
2002-04-01	16.9
2002-07-01	17.0
2002-10-01	17.2
2003-01-01	16.8
2003-04-01	15.3
2003-07-01	15.2
2003-10-01	15.6
2004-01-01	14.8
2004-04-01	16.7
2004-07-01	16.0
2004-10-01	16.3
2005-01-01	16.5
2005-04-01	16.8
2005-07-01	17.0
2005-10-01	15.6
2006-01-01	13.8
2006-04-01	14.2
2006-07-01	14.0
2006-10-01	14.4
2007-01-01	13.9
2007-04-01	12.7
2007-07-01	13.1
2007-10-01	14.8
2008-01-01	14.6
2008-04-01	15.0
2008-07-01	15.3
2008-10-01	15.6
2009-01-01	14.9
2009-04-01	13.7
2009-07-01	13.3
2009-10-01	13.6
2010-01-01	11.8
2010-04-01	13.0
2010-07-01	12.4
2010-10-01	13.4
2011-01-01	12.7
2011-04-01	13.2
2011-07-01	14.3
2011-10-01	14.9
2012-01-01	15.8
2012-04-01	16.7
2012-07-01	17.1
2012-10-01	18.2
2013-01-01	18.1
2013-04-01	19.1
2013-07-01	20.8
2013-10-01	21.8
2014-01-01	20.8
2014-04-01	21.8
2014-07-01	22.3
2014-10-01	22.5
2015-01-01	22.4
2015-04-01	22.9
2015-07-01	23.5
2015-10-01	23.8
2016-01-01	22.8
2016-04-01	23.2
2016-07-01	23.1
2016-10-01	23.5
2017-01-01	22.5
2017-04-01	22.7
2017-07-01	22.2
2017-10-01	22.3
2018-01-01	21.9