Quarter	Billions of US Dollars
1998-04-01	0.02376
1998-07-01	0.02290
1998-10-01	0.02003
1999-01-01	0.01711
2001-07-01	0.00290
2001-10-01	0.00345
2002-01-01	0.00373
2002-04-01	0.00318
2005-01-01	0.24269
2005-04-01	0.31977
2005-07-01	0.37266
2005-10-01	0.57925
2006-01-01	0.53268
2006-04-01	0.46474
2006-07-01	0.44179
2006-10-01	0.63417
2007-01-01	0.69003
2007-04-01	0.94409
2007-07-01	1.55774
2007-10-01	1.64046
2008-01-01	2.14926
2008-04-01	3.29175
2008-07-01	3.26951
2008-10-01	1.28442
2009-01-01	0.22464
2009-04-01	0.02881
2009-07-01	0.10635
2009-10-01	0.22178
2010-01-01	0.31651
2010-04-01	0.31199
2010-07-01	0.39463
2010-10-01	0.31922
2011-01-01	0.20657
2011-04-01	0.30658
2011-07-01	0.28301
2011-10-01	0.30846
2012-01-01	0.44946
2012-04-01	0.30366
2012-07-01	0.30348
2012-10-01	0.37398
2013-01-01	0.37847
2013-04-01	0.19584
2013-07-01	0.17699
2013-10-01	0.19519
2014-01-01	0.39238
2014-04-01	0.30372
2014-07-01	0.13985
2014-10-01	0.24546
2015-01-01	0.33666
2015-04-01	0.08869