Quarter	Billions of US Dollars
1998-04-01	0.1000
1998-07-01	0.1000
1998-10-01	0.1000
1999-01-01	0.1000
1999-04-01	0.1000
1999-07-01	0.1000
1999-10-01	0.1000
2000-01-01	0.1000
2000-04-01	0.1000
2000-07-01	0.1000
2000-10-01	0.1000
2001-01-01	0.1000
2001-04-01	0.1000
2001-07-01	0.1000
2001-10-01	0.1000
2002-01-01	0.2091
2002-04-01	0.4747
2002-07-01	0.4732
2002-10-01	0.5311
2003-01-01	0.5362
2003-04-01	1.2678
2003-07-01	1.2706
2003-10-01	1.2829
2004-01-01	1.5778
2004-04-01	1.9769
2004-07-01	1.9801
2004-10-01	4.0703
2005-01-01	4.5620
2005-04-01	4.5512
2005-07-01	4.8505
2005-10-01	5.4475
2006-01-01	6.4263
2006-04-01	8.2839
2006-07-01	9.8544
2006-10-01	11.2041
2007-01-01	11.8129
2007-04-01	14.7159
2007-07-01	14.7181
2007-10-01	15.5504
2008-01-01	15.6987
2008-04-01	16.2719
2008-07-01	20.1996
2008-10-01	20.2134
2009-01-01	19.7883
2009-04-01	19.7220
2009-07-01	21.4555
2009-10-01	21.9923
2010-01-01	21.8347
2010-04-01	21.8372
2010-07-01	20.8013
2010-10-01	21.7571
2011-01-01	21.4542
2011-04-01	20.9613
2011-07-01	20.8030
2011-10-01	20.1881
2012-01-01	20.1881
2012-04-01	20.1881
2012-07-01	20.9881
2012-10-01	20.9881
2013-01-01	20.9881
2013-04-01	20.6881
2013-07-01	18.4106
2013-10-01	17.9106
2014-01-01	17.4106
2014-04-01	16.7277
2014-07-01	16.3572
2014-10-01	15.3596
2015-01-01	12.4736
2015-04-01	12.5484