Quarter	Billions of US Dollars
2011-01-01	483.072
2011-04-01	506.136
2011-07-01	479.829
2011-10-01	462.323
2012-01-01	506.940
2012-04-01	480.519
2012-07-01	539.445
2012-10-01	547.802
2013-01-01	556.123
2013-04-01	535.844
2013-07-01	530.445
2013-10-01	564.644
2014-01-01	584.709
2014-04-01	605.221
2014-07-01	612.231
2014-10-01	611.035
2015-01-01	632.578