Quarter	Millions of US Dollars
2007-10-01	2268
2008-01-01	2568
2008-04-01	2354
2008-07-01	2094
2008-10-01	2040
2009-01-01	1598
2009-04-01	1951
2009-07-01	2250
2009-10-01	1869
2010-01-01	2473
2010-04-01	2602
2010-07-01	2985
2010-10-01	3330
2011-01-01	3261
2011-04-01	3528
2011-07-01	3357
2011-10-01	3228
2012-01-01	2009
2012-04-01	953
2012-07-01	423
2012-10-01	120
2013-01-01	1101
2013-04-01	638
2013-07-01	1712
2013-10-01	1835
2014-01-01	1799
2014-04-01	1879
2014-07-01	0
2014-10-01	0
2015-01-01	0
2015-04-01	0
2015-07-01	0
2015-10-01	667
2016-01-01	1555
2016-04-01	2503
2016-07-01	2917
2016-10-01	2773
2017-01-01	2889
2017-04-01	2738
2017-07-01	2856
2017-10-01	2815
2018-01-01	3255