Quarter	Billions of US Dollars
1999-04-01	0.2066
1999-07-01	0.2633
1999-10-01	0.2908
2000-01-01	0.2458
2000-04-01	0.0247
2000-07-01	0.0139
2000-10-01	0.0087
2001-01-01	0.0080
2001-04-01	0.0887
2001-10-01	0.0363
2002-01-01	0.1664
2002-04-01	0.4963
2002-07-01	1.2709
2002-10-01	1.1941
2003-01-01	1.0802
2003-04-01	1.7142
2003-07-01	1.8332
2003-10-01	1.9860
2004-01-01	3.6503
2004-04-01	6.3130
2004-07-01	8.0018
2004-10-01	8.6443
2005-01-01	8.1710
2005-04-01	5.3453
2005-07-01	4.2436
2005-10-01	5.6143
2006-01-01	6.8021
2006-04-01	8.5972
2006-07-01	7.7513
2006-10-01	6.6229
2007-01-01	11.2349
2007-04-01	10.8216
2007-07-01	12.1796
2007-10-01	15.3074
2008-01-01	14.8218
2008-04-01	16.3110
2008-07-01	16.1430
2008-10-01	12.7223
2009-01-01	16.4383
2009-04-01	27.1610
2009-07-01	25.3413
2009-10-01	31.5749
2010-01-01	32.5911
2010-04-01	23.4863
2010-07-01	33.6376
2010-10-01	26.4963
2011-01-01	34.6222
2011-04-01	32.3651
2011-07-01	23.2482
2011-10-01	21.1680
2012-01-01	11.1215
2012-04-01	12.3923
2012-07-01	15.1175
2012-10-01	14.5623
2013-01-01	15.2943
2013-04-01	16.7327
2013-07-01	16.3539
2013-10-01	16.3164
2014-01-01	20.1273
2014-04-01	21.5698
2014-07-01	19.8659
2014-10-01	22.3804
2015-01-01	17.2745
2015-04-01	28.3826