Quarter	Billions of US Dollars
1999-10-01	6.385
2000-01-01	5.079
2000-04-01	4.762
2000-07-01	4.058
2000-10-01	4.935
2001-01-01	5.434
2001-04-01	5.642
2001-07-01	7.434
2001-10-01	7.048
2002-01-01	7.317
2002-04-01	7.318
2002-07-01	7.485
2002-10-01	9.327
2003-01-01	10.275
2003-04-01	10.842
2003-07-01	12.037
2003-10-01	12.902
2004-01-01	10.847
2004-04-01	9.695
2004-07-01	10.600
2004-10-01	18.157
2005-01-01	12.336
2005-04-01	11.702
2005-07-01	11.122
2005-10-01	9.878
2006-01-01	8.239
2006-04-01	8.922
2006-07-01	9.863
2006-10-01	7.819
2007-01-01	7.530
2007-04-01	2.518
2007-07-01	1.179
2007-10-01	2.026
2008-01-01	2.849
2008-04-01	5.744
2008-07-01	6.921
2008-10-01	4.752
2009-01-01	0.477
2009-04-01	7.886
2009-07-01	10.763
2009-10-01	31.348
2010-01-01	23.877
2010-04-01	19.400
2010-07-01	17.950
2010-10-01	8.686
2011-01-01	9.647
2011-04-01	9.707
2011-07-01	12.375
2011-10-01	10.530
2012-01-01	9.206
2012-04-01	9.715
2012-07-01	10.162
2012-10-01	9.571
2013-01-01	6.193
2013-04-01	5.130
2013-07-01	7.020
2013-10-01	7.595
2014-01-01	5.970
2014-04-01	3.470
2014-07-01	4.937
2014-10-01	6.005
2015-01-01	3.524