Quarter	Billions of US Dollars
1993-07-01	39.346
1993-10-01	44.396
1994-01-01	47.119
1994-04-01	43.017
1994-07-01	54.213
1994-10-01	45.571
1995-01-01	60.570
1995-04-01	50.333
1995-07-01	62.531
1995-10-01	62.118
1996-01-01	87.694
1996-04-01	82.776
1996-07-01	77.648
1996-10-01	92.689
1997-01-01	109.615
1997-04-01	91.500
1997-07-01	95.921
1997-10-01	64.294
1998-01-01	111.266
1998-04-01	108.047
1998-07-01	76.112
1998-10-01	87.253
1999-01-01	149.503
1999-04-01	143.608
1999-07-01	158.124
1999-10-01	108.758
2000-01-01	159.281
2000-04-01	157.775
2000-07-01	171.393
2000-10-01	167.880
2001-01-01	280.380
2001-04-01	248.257
2001-07-01	171.500
2001-10-01	208.937
2002-01-01	247.412
2002-04-01	227.172
2002-07-01	155.619
2002-10-01	191.301
2003-01-01	266.935
2003-04-01	280.377
2003-07-01	242.949
2003-10-01	274.163
2004-01-01	364.101
2004-04-01	263.964
2004-07-01	291.456
2004-10-01	299.324
2005-01-01	375.671
2005-04-01	322.776
2005-07-01	327.466
2005-10-01	329.573
2006-01-01	434.107
2006-04-01	407.646
2006-07-01	389.601
2006-10-01	487.451
2007-01-01	537.968
2007-04-01	587.454
2007-07-01	389.423
2007-10-01	417.718
2008-01-01	397.337
2008-04-01	639.928
2008-07-01	310.041
2008-10-01	298.424
2009-01-01	504.011
2009-04-01	544.681
2009-07-01	470.797
2009-10-01	436.769
2010-01-01	507.410
2010-04-01	325.370
2010-07-01	458.785
2010-10-01	354.869
2011-01-01	557.400
2011-04-01	428.454
2011-07-01	283.093
2011-10-01	303.874
2012-01-01	652.279
2012-04-01	365.115
2012-07-01	443.905
2012-10-01	431.225
2013-01-01	438.767
2013-04-01	404.108
2013-07-01	355.435
2013-10-01	422.442
2014-01-01	529.454
2014-04-01	550.603
2014-07-01	444.031
2014-10-01	390.177
2015-01-01	527.165
2015-04-01	473.888