Quarter	Millions of US Dollars
2007-10-01	50716
2008-01-01	59653
2008-04-01	57057
2008-07-01	50577
2008-10-01	49959
2009-01-01	46744
2009-04-01	56754
2009-07-01	63328
2009-10-01	60356
2010-01-01	67136
2010-04-01	70509
2010-07-01	76778
2010-10-01	73132
2011-01-01	77816
2011-04-01	81457
2011-07-01	78390
2011-10-01	78706
2012-01-01	87635
2012-04-01	86498
2012-07-01	87003
2012-10-01	88760
2013-01-01	88396
2013-04-01	85814
2013-07-01	92304
2013-10-01	92424
2014-01-01	96042
2014-04-01	101244
2014-07-01	95714
2014-10-01	82808
2015-01-01	78814
2015-04-01	82213
2015-07-01	68985
2015-10-01	64747
2016-01-01	72169
2016-04-01	76897
2016-07-01	80665
2016-10-01	78375
2017-01-01	86179
2017-04-01	81705
2017-07-01	87710
2017-10-01	90092
2018-01-01	101498