Quarter	Billions of US Dollars
2010-04-01	24.183
2010-07-01	31.126
2010-10-01	24.956
2011-01-01	36.480
2011-04-01	38.181
2011-07-01	29.757
2011-10-01	23.537
2012-01-01	28.519
2012-04-01	27.810
2012-07-01	29.096
2012-10-01	29.086
2013-01-01	32.364
2013-04-01	33.849
2013-07-01	34.747
2013-10-01	39.227
2014-01-01	41.512
2014-04-01	38.167
2014-07-01	14.653
2014-10-01	11.796
2015-01-01	12.568