Quarter	Billions of US Dollars
2006-04-01	0.21900
2006-07-01	0.21536
2006-10-01	0.22126
2007-01-01	0.22109
2007-04-01	0.42394
2007-07-01	0.44444
2007-10-01	0.46202
2008-01-01	0.52319
2008-04-01	0.51096
2008-07-01	0.47200
2008-10-01	0.48886
2009-01-01	0.61648
2009-04-01	0.65096
2009-07-01	0.68106
2009-10-01	0.67748
2010-01-01	0.49047
2010-04-01	0.66593
2010-07-01	0.73998
2010-10-01	0.76628
2011-01-01	0.78706
2011-04-01	0.53931
2011-07-01	0.49922
2011-10-01	0.47827
2012-01-01	0.49828
2012-04-01	0.20934
2012-07-01	0.48103
2012-10-01	0.49094
2013-01-01	0.78773
2013-04-01	0.79686
2013-07-01	0.82855
2013-10-01	0.84128
2014-01-01	0.84842
2014-04-01	0.84241
2014-07-01	0.78280
2014-10-01	0.75827
2015-01-01	0.77097
2015-04-01	1.02085