Quarter	Millions of US Dollars
2007-10-01	51537
2008-01-01	60581
2008-04-01	57939
2008-07-01	51362
2008-10-01	50720
2009-01-01	47410
2009-04-01	57603
2009-07-01	64440
2009-10-01	61401
2010-01-01	68273
2010-04-01	71657
2010-07-01	78007
2010-10-01	75024
2011-01-01	79747
2011-04-01	83501
2011-07-01	80295
2011-10-01	80563
2012-01-01	89659
2012-04-01	88499
2012-07-01	88958
2012-10-01	90748
2013-01-01	90315
2013-04-01	87757
2013-07-01	94668
2013-10-01	94773
2014-01-01	98344
2014-04-01	103650
2014-07-01	97945
2014-10-01	84699
2015-01-01	80570
2015-04-01	84099
2015-07-01	70546
2015-10-01	66111
2016-01-01	73724
2016-04-01	78508
2016-07-01	82296
2016-10-01	79614
2017-01-01	87754
2017-04-01	83428
2017-07-01	89490
2017-10-01	88952
2018-01-01	100040