Quarter	Billions of US Dollars
1997-07-01	0.20000
1997-10-01	0.20000
1998-01-01	0.20000
1998-04-01	0.45000
1998-07-01	0.45000
1998-10-01	0.45000
1999-01-01	0.45000
1999-04-01	0.45000
1999-07-01	0.45000
1999-10-01	0.45000
2000-01-01	0.64106
2000-04-01	0.64112
2000-07-01	0.85030
2000-10-01	0.86110
2001-01-01	1.00620
2001-04-01	1.39300
2001-07-01	1.41741
2001-10-01	1.65549
2002-01-01	1.65215
2002-04-01	1.99906
2002-07-01	1.79475
2002-10-01	1.81826
2003-01-01	1.61566
2003-04-01	1.62497
2003-07-01	1.62891
2003-10-01	1.64602
2004-01-01	1.88340
2004-04-01	2.00581
2004-07-01	2.04636
2004-10-01	2.29916
2005-01-01	2.26302
2005-04-01	2.26506
2005-07-01	2.26231
2005-10-01	2.49884
2006-01-01	2.76572
2006-04-01	2.79922
2006-07-01	2.79630
2006-10-01	2.82435
2007-01-01	3.18249
2007-04-01	3.19278
2007-07-01	3.00485
2007-10-01	3.18465
2008-01-01	3.24466
2008-04-01	3.59202
2008-07-01	3.51167
2008-10-01	3.49043
2009-01-01	3.19078
2009-04-01	3.21969
2009-07-01	3.23751
2009-10-01	3.22921
2010-01-01	3.19676
2010-04-01	3.15448
2010-07-01	3.20268
2010-10-01	3.19267
2011-01-01	3.62225
2011-04-01	3.23085
2011-07-01	3.19761
2011-10-01	3.17787
2012-01-01	3.19246
2012-04-01	3.16565
2012-07-01	2.91895
2012-10-01	2.92291
2013-01-01	2.91707
2013-04-01	2.92120
2013-07-01	2.92758
2013-10-01	2.93186
2014-01-01	2.93182
2014-04-01	2.92987
2014-07-01	3.71375
2014-10-01	3.52500
2015-01-01	3.52500
2015-04-01	3.22500