Quarter	Billions of US Dollars
2000-01-01	41.770
2000-04-01	41.456
2000-07-01	36.223
2000-10-01	36.379
2001-01-01	34.156
2001-04-01	32.298
2001-07-01	35.899
2001-10-01	35.726
2002-01-01	35.721
2002-04-01	41.765
2002-07-01	42.265
2002-10-01	43.559
2003-01-01	45.976
2003-04-01	50.459
2003-07-01	51.833
2003-10-01	55.019
2004-01-01	54.997
2004-04-01	57.051
2004-07-01	57.037
2004-10-01	60.005
2005-01-01	58.402
2005-04-01	56.056
2005-07-01	55.606
2005-10-01	52.352
2006-01-01	56.166
2006-04-01	59.230
2006-07-01	57.634
2006-10-01	57.542
2007-01-01	60.131
2007-04-01	61.533
2007-07-01	75.871
2007-10-01	69.407
2008-01-01	81.592
2008-04-01	94.601
2008-07-01	101.938
2008-10-01	110.816
2009-01-01	119.160
2009-04-01	143.135
2009-07-01	150.974
2009-10-01	150.801
2010-01-01	167.552
2010-04-01	151.817
2010-07-01	190.037
2010-10-01	192.718
2011-01-01	220.925
2011-04-01	229.326
2011-07-01	253.705
2011-10-01	245.477
2012-01-01	259.499
2012-04-01	251.498
2012-07-01	272.052
2012-10-01	277.110
2013-01-01	279.504
2013-04-01	285.694
2013-07-01	295.122
2013-10-01	296.977
2014-01-01	296.499
2014-04-01	286.161
2014-07-01	262.122
2014-10-01	246.880
2015-01-01	219.001
2015-04-01	228.394
2015-07-01	228.035
2015-10-01	219.514
2016-01-01	235.932
2016-04-01	222.517
2016-07-01	225.998
2016-10-01	211.529
2017-01-01	222.973
2017-04-01	241.105
2017-07-01	249.090
2017-10-01	241.427
2018-01-01	258.543