Quarter	Billions of US Dollars
1987-01-01	0.20000
1987-04-01	0.20000
1987-07-01	0.20000
2004-10-01	0.18667
2005-01-01	0.78667
2005-04-01	0.78692
2005-07-01	0.78692
2005-10-01	1.48692
2006-01-01	1.48692
2006-04-01	2.90009
2006-07-01	2.93825
2006-10-01	3.45591
2007-01-01	3.46069
2007-04-01	3.46659
2007-07-01	3.49022
2007-10-01	3.50952
2008-01-01	3.55086
2008-04-01	3.54813
2008-07-01	3.45151
2008-10-01	3.43897
2009-01-01	3.50080
2009-04-01	3.54687
2009-07-01	3.56673
2009-10-01	3.75988
2010-01-01	3.97373
2010-04-01	3.93025
2010-07-01	3.98459
2010-10-01	3.88113
2011-01-01	3.90583
2011-04-01	2.44370
2011-07-01	2.42588
2011-10-01	2.42517
2012-01-01	2.43100
2012-04-01	2.42448
2012-07-01	2.42332
2012-10-01	2.42116
2013-01-01	2.41426
2013-04-01	2.40681
2013-07-01	2.40712
2013-10-01	2.30388
2014-01-01	2.30326
2014-04-01	2.30310
2014-07-01	2.29837
2014-10-01	2.29692
2015-01-01	1.45031
2015-04-01	1.45022