Quarter	Billions of US Dollars
2005-01-01	18.937
2005-04-01	26.764
2005-07-01	27.697
2005-10-01	26.351
2006-01-01	32.509
2006-04-01	33.364
2006-07-01	36.713
2006-10-01	39.636
2007-01-01	45.491
2007-04-01	47.838
2007-07-01	44.004
2007-10-01	45.307
2008-01-01	52.429
2008-04-01	53.873
2008-07-01	46.791
2008-10-01	38.245
2009-01-01	32.728
2009-04-01	33.856
2009-07-01	31.600
2009-10-01	29.356
2010-01-01	27.946
2010-04-01	39.952
2010-07-01	45.372
2010-10-01	51.288
2011-01-01	53.358
2011-04-01	56.240
2011-07-01	62.101
2011-10-01	54.889
2012-01-01	69.617
2012-04-01	66.632
2012-07-01	74.261
2012-10-01	72.324
2013-01-01	61.588
2013-04-01	55.346
2013-07-01	50.360
2013-10-01	50.475
2014-01-01	47.867
2014-04-01	47.778
2014-07-01	54.655
2014-10-01	51.383
2015-01-01	36.936