Quarter	Billions of US Dollars
1996-01-01	0.33915
1996-04-01	0.31145
1996-07-01	0.32561
1996-10-01	0.31500
1997-01-01	0.44658
1997-04-01	0.82096
1997-07-01	1.46302
1997-10-01	1.43695
1998-01-01	1.22045
1998-04-01	0.73298
1998-07-01	0.44274
1998-10-01	0.31570
1999-01-01	0.17772
1999-04-01	0.18225
1999-07-01	0.13319
1999-10-01	0.24372
2000-01-01	0.16764
2000-04-01	0.13291
2000-07-01	0.09647
2005-07-01	0.01981
2005-10-01	0.39635
2006-01-01	0.40021
2006-04-01	0.34635
2006-07-01	0.30358
2006-10-01	0.24274
2007-01-01	0.23256
2007-04-01	0.30828
2007-07-01	0.31905
2007-10-01	0.32186
2008-01-01	0.33503
2008-04-01	0.34457
2008-07-01	0.58765
2008-10-01	0.37612
2009-01-01	0.36797
2009-04-01	0.45392
2009-07-01	0.38003
2009-10-01	0.22485
2010-01-01	0.20716
2010-04-01	0.23417
2010-07-01	0.13856
2010-10-01	0.19415
2011-01-01	0.18962
2011-04-01	0.15676
2011-07-01	0.12780
2011-10-01	0.09616
2012-01-01	0.10204
2012-04-01	0.01463
2012-07-01	0.01445
2012-10-01	0.01412
2013-01-01	0.10674
2013-04-01	0.16063
2013-07-01	0.25974
2013-10-01	0.27264
2014-01-01	0.32280
2014-04-01	0.28437
2014-07-01	0.16763
2014-10-01	0.20724
2015-01-01	0.19381
2015-04-01	0.16459