Quarter	Billions of US Dollars
1996-10-01	56.8
1997-01-01	57.8
1997-04-01	60.7
1997-07-01	58.2
1997-10-01	60.8
1998-01-01	60.8
1998-04-01	63.6
1998-07-01	58.6
1998-10-01	59.1
1999-01-01	60.6
1999-04-01	54.7
1999-07-01	47.8
1999-10-01	52.0
2000-01-01	48.9
2000-04-01	45.1
2000-07-01	44.1
2000-10-01	43.8
2001-01-01	42.7
2001-04-01	43.8
2001-07-01	43.9
2001-10-01	45.4
2002-01-01	46.3
2002-04-01	46.3
2002-07-01	40.5
2002-10-01	41.3
2003-01-01	39.9
2003-04-01	42.0
2003-07-01	41.2
2003-10-01	43.1
2004-01-01	44.9
2004-04-01	45.2
2004-07-01	47.5
2004-10-01	52.2
2005-01-01	52.9
2005-04-01	55.2
2005-07-01	56.8
2005-10-01	58.7
2006-01-01	59.7
2006-04-01	55.1
2006-07-01	63.2
2006-10-01	71.2
2007-01-01	76.5
2007-04-01	87.9
2007-07-01	89.3
2007-10-01	92.4
2008-01-01	103.5
2008-04-01	101.3
2008-07-01	92.7
2008-10-01	92.6
2009-01-01	82.5
2009-04-01	101.4
2009-07-01	114.9
2009-10-01	111.0
2010-01-01	119.2
2010-04-01	124.5
2010-07-01	139.2
2010-10-01	138.9
2011-01-01	146.0
2011-04-01	160.9
2011-07-01	156.1
2011-10-01	160.3
2012-01-01	175.8
2012-04-01	177.8
2012-07-01	181.6
2012-10-01	190.9
2013-01-01	188.7
2013-04-01	189.0
2013-07-01	197.0
2013-10-01	202.4
2014-01-01	205.9
2014-04-01	226.4
2014-07-01	216.5
2014-10-01	192.9
2015-01-01	183.6
2015-04-01	190.2
2015-07-01	164.0
2015-10-01	167.8
2016-01-01	177.0
2016-04-01	186.8
2016-07-01	191.5
2016-10-01	185.2
2017-01-01	195.2
2017-04-01	189.5
2017-07-01	197.7
2017-10-01	197.8
2018-01-01	214.2