Quarter	Billions of US Dollars
1997-10-01	3455.582
1998-01-01	3482.546
1998-04-01	3421.540
1998-07-01	3516.561
1998-10-01	4390.858
1999-01-01	4317.495
1999-04-01	4483.613
1999-07-01	5181.867
1999-10-01	5485.830
2000-01-01	5623.437
2000-04-01	5664.553
2000-07-01	5550.205
2000-10-01	5344.902
2001-01-01	5087.541
2001-04-01	5222.990
2001-07-01	5386.014
2001-10-01	4951.623
2002-01-01	4968.980
2002-04-01	5666.399
2002-07-01	5490.095
2002-10-01	5628.114
2003-01-01	5807.307
2003-04-01	5862.141
2003-07-01	6408.356
2003-10-01	6714.110
2004-01-01	7213.838
2004-04-01	7032.250
2004-07-01	6829.132
2004-10-01	7427.444
2005-01-01	7226.339
2005-04-01	7058.686
2005-07-01	6862.906
2005-10-01	6622.953
2006-01-01	6622.981
2006-04-01	6764.302
2006-07-01	6565.768
2006-10-01	6497.676
2007-01-01	6523.099
2007-04-01	6266.224
2007-07-01	6682.894
2007-10-01	6876.028
2008-01-01	7746.046
2008-04-01	7316.730
2008-07-01	7287.685
2008-10-01	8482.560
2009-01-01	7923.300
2009-04-01	8348.331
2009-07-01	9012.042
2009-10-01	8841.809
2010-01-01	8887.017
2010-04-01	9529.343
2010-07-01	10183.090
2010-10-01	10649.331
2011-01-01	10512.600
2011-04-01	11019.972
2011-07-01	11651.749
2011-10-01	11788.940
2012-01-01	11268.084
2012-04-01	11804.485
2012-07-01	12173.535
2012-10-01	11071.755
2013-01-01	10173.731
2013-04-01	9853.716
2013-07-01	10045.690
2013-10-01	9453.059
2014-01-01	9627.045
2014-04-01	9954.223
2014-07-01	9243.537
2014-10-01	8624.927
2015-01-01	8675.391
2015-04-01	8555.921
2015-07-01	8705.992
2015-10-01	8743.198
2016-01-01	9397.007
2016-04-01	10386.434
2016-07-01	10601.945
2016-10-01	9206.712
2017-01-01	9676.972
2017-04-01	9739.017
2017-07-01	9711.415
2017-10-01	9758.399
2018-01-01	10337.306