Quarter	Millions of US Dollars
2007-10-01	4004
2008-01-01	4086
2008-04-01	4026
2008-07-01	4040
2008-10-01	3763
2009-01-01	3744
2009-04-01	3950
2009-07-01	4061
2009-10-01	4384
2010-01-01	4352
2010-04-01	4518
2010-07-01	4641
2010-10-01	4382
2011-01-01	4326
2011-04-01	4573
2011-07-01	4392
2011-10-01	4284
2012-01-01	4253
2012-04-01	4128
2012-07-01	4154
2012-10-01	4224
2013-01-01	4133
2013-04-01	3452
2013-07-01	3740
2013-10-01	3823
2014-01-01	3824
2014-04-01	3784
2014-07-01	3788
2014-10-01	3697
2015-01-01	3848
2015-04-01	4039
2015-07-01	4188
2015-10-01	4155
2016-01-01	4297
2016-04-01	4494
2016-07-01	4557
2016-10-01	4735
2017-01-01	4939
2017-04-01	5141
2017-07-01	5348
2017-10-01	5321
2018-01-01	5189