Quarter	Millions of US Dollars
2007-10-01	3804
2008-01-01	3970
2008-04-01	3926
2008-07-01	3896
2008-10-01	3667
2009-01-01	3600
2009-04-01	3814
2009-07-01	3951
2009-10-01	4297
2010-01-01	4255
2010-04-01	4441
2010-07-01	4602
2010-10-01	4359
2011-01-01	4303
2011-04-01	4514
2011-07-01	4323
2011-10-01	4209
2012-01-01	4171
2012-04-01	4052
2012-07-01	4086
2012-10-01	4117
2013-01-01	4044
2013-04-01	3373
2013-07-01	3654
2013-10-01	3796
2014-01-01	3796
2014-04-01	3752
2014-07-01	3756
2014-10-01	3653
2015-01-01	3799
2015-04-01	3987
2015-07-01	4133
2015-10-01	4098
2016-01-01	4233
2016-04-01	4367
2016-07-01	4436
2016-10-01	4621
2017-01-01	4838
2017-04-01	5064
2017-07-01	5225
2017-10-01	5194
2018-01-01	5060