Quarter	Billions of US Dollars
1998-01-01	1.27731
1998-04-01	1.27731
1998-07-01	1.27199
1998-10-01	1.27199
1999-01-01	1.26666
1999-04-01	1.26666
1999-07-01	1.26134
1999-10-01	1.26134
2000-01-01	1.25602
2000-04-01	1.25602
2000-07-01	1.25070
2000-10-01	1.25070
2001-01-01	1.24538
2001-04-01	1.24538
2001-07-01	1.24006
2001-10-01	1.24006
2002-01-01	1.23474
2002-04-01	1.23474
2002-07-01	1.22942
2002-10-01	1.22942
2003-01-01	1.22410
2003-04-01	1.22410
2003-07-01	1.21771
2003-10-01	1.21771
2004-01-01	1.21133
2004-04-01	1.21133
2004-07-01	1.20494
2004-10-01	1.20494
2005-01-01	1.19856
2005-04-01	1.19856
2005-07-01	1.19217
2005-10-01	1.19217
2006-01-01	1.18579
2006-04-01	1.18579
2006-07-01	1.17940
2006-10-01	1.17940
2007-01-01	1.17302
2007-04-01	1.17302
2007-07-01	1.16663
2007-10-01	1.16663
2008-01-01	1.15812
2008-04-01	1.15812
2008-07-01	1.14960
2008-10-01	1.14960
2009-01-01	1.14109
2009-04-01	1.14109
2009-07-01	1.13258
2009-10-01	1.13258
2010-01-01	1.12406
2010-04-01	2.60514
2010-07-01	2.59237
2010-10-01	2.59237
2011-01-01	2.57960
2011-04-01	2.57960
2011-07-01	2.56683
2011-10-01	2.56683
2012-01-01	2.55406
2012-04-01	2.55406
2012-07-01	2.53703
2012-10-01	2.53703
2013-01-01	2.52000
2013-04-01	2.52000
2013-07-01	2.50297
2013-10-01	2.50297
2014-01-01	2.48594
2014-04-01	2.48594
2014-07-01	3.21892
2014-10-01	3.21892
2015-01-01	4.20189
2015-04-01	4.20189