Quarter	Billions of US Dollars
1996-04-01	0.03942
1996-07-01	0.03930
1996-10-01	0.03859
1997-01-01	0.05364
1997-04-01	0.06020
1997-07-01	0.12781
1997-10-01	0.14731
1998-01-01	0.14337
1998-04-01	0.14940
1998-07-01	0.16009
1998-10-01	0.15317
1999-01-01	0.19376
1999-04-01	0.23839
1999-07-01	0.25636
1999-10-01	0.22070
2000-01-01	0.19571
2000-04-01	0.17476
2000-07-01	0.14963
2000-10-01	0.15703
2001-01-01	0.14228
2001-04-01	0.11617
2001-07-01	0.12353
2001-10-01	0.10400
2002-01-01	0.05933
2002-04-01	0.12089
2002-07-01	0.31669
2002-10-01	0.33300
2003-01-01	0.34595
2003-04-01	0.35868
2003-07-01	0.36573
2003-10-01	0.39398
2004-01-01	0.38132
2004-04-01	0.41175
2004-07-01	0.40795
2004-10-01	0.44779
2005-01-01	0.42619
2005-04-01	0.39752
2005-07-01	0.39588
2005-10-01	0.57823
2006-01-01	0.52669
2006-04-01	0.55319
2006-07-01	0.55089
2006-10-01	0.57308
2007-01-01	0.57952
2007-04-01	0.45261
2007-07-01	0.47520
2007-10-01	0.53099
2008-01-01	0.57034
2008-04-01	0.56861
2008-07-01	0.51591
2008-10-01	0.50199
2009-01-01	0.48002
2009-04-01	0.50981
2009-07-01	0.52817
2009-10-01	0.51962
2010-01-01	0.48619
2010-04-01	0.44261
2010-07-01	0.49228
2010-10-01	0.48197
2011-01-01	0.51245
2011-04-01	0.52132
2011-07-01	0.79087
2011-10-01	0.75784
2012-01-01	0.78226
2012-04-01	1.11510
2012-07-01	1.14521
2012-10-01	1.16859
2013-01-01	1.13414
2013-04-01	1.30775
2013-07-01	1.34589
2013-10-01	1.36949
2014-01-01	1.50933
2014-04-01	1.45334
2014-07-01	1.34367
2014-10-01	1.28296
2015-01-01	1.14083
2015-04-01	1.18528