Quarter	Percentage of GDP
1997-10-01	301.5
1998-01-01	301.1
1998-04-01	303.5
1998-07-01	307.2
1998-10-01	303.1
1999-01-01	304.3
1999-04-01	306.9
1999-07-01	308.6
1999-10-01	314.0
2000-01-01	313.7
2000-04-01	312.5
2000-07-01	311.7
2000-10-01	312.6
2001-01-01	316.2
2001-04-01	315.3
2001-07-01	313.3
2001-10-01	314.9
2002-01-01	316.7
2002-04-01	319.2
2002-07-01	316.1
2002-10-01	317.0
2003-01-01	319.4
2003-04-01	318.3
2003-07-01	314.0
2003-10-01	316.0
2004-01-01	317.8
2004-04-01	316.7
2004-07-01	313.8
2004-10-01	315.0
2005-01-01	317.9
2005-04-01	316.8
2005-07-01	314.6
2005-10-01	315.0
2006-01-01	312.4
2006-04-01	309.5
2006-07-01	311.1
2006-10-01	311.0
2007-01-01	309.1
2007-04-01	304.9
2007-07-01	305.7
2007-10-01	307.7
2008-01-01	308.3
2008-04-01	308.2
2008-07-01	309.3
2008-10-01	316.9
2009-01-01	323.2
2009-04-01	331.3
2009-07-01	337.0
2009-10-01	341.8
2010-01-01	341.1
2010-04-01	343.2
2010-07-01	341.0
2010-10-01	340.8
2011-01-01	340.1
2011-04-01	345.6
2011-07-01	350.2
2011-10-01	354.6
2012-01-01	354.8
2012-04-01	354.4
2012-07-01	357.3
2012-10-01	359.6
2013-01-01	363.7
2013-04-01	362.0
2013-07-01	362.8
2013-10-01	363.4
2014-01-01	361.7
2014-04-01	362.4
2014-07-01	363.7
2014-10-01	369.3
2015-01-01	366.3
2015-04-01	362.6
2015-07-01	360.4
2015-10-01	361.6
2016-01-01	366.8
2016-04-01	371.7
2016-07-01	370.5
2016-10-01	369.1
2017-01-01	369.2
2017-04-01	369.3
2017-07-01	368.9
2017-10-01	369.8
2018-01-01	368.7