Quarter	Billions of US Dollars
2009-04-01	282.012
2009-07-01	284.635
2009-10-01	292.794
2010-01-01	321.130
2010-04-01	321.819
2010-07-01	334.896
2010-10-01	346.471
2011-01-01	379.185
2011-04-01	397.249
2011-07-01	370.559
2011-10-01	364.919
2012-01-01	418.618
2012-04-01	395.611
2012-07-01	436.855
2012-10-01	441.552
2013-01-01	485.164
2013-04-01	469.823
2013-07-01	490.511
2013-10-01	497.489
2014-01-01	517.871
2014-04-01	532.248
2014-07-01	534.585
2014-10-01	492.063
2015-01-01	493.490