Quarter	Millions of US Dollars
2000-01-01	1590
2000-04-01	1553
2000-07-01	1563
2000-10-01	1646
2001-01-01	1491
2001-04-01	1432
2001-07-01	1659
2001-10-01	1773
2002-01-01	1666
2002-04-01	2044
2002-07-01	2077
2002-10-01	2505
2003-01-01	2766
2003-04-01	3024
2003-07-01	3012
2003-10-01	3064
2004-01-01	3294
2004-04-01	3290
2004-07-01	3620
2004-10-01	4223
2005-01-01	4473
2005-04-01	4146
2005-07-01	4530
2005-10-01	4718
2006-01-01	5153
2006-04-01	5422
2006-07-01	5786
2006-10-01	6368
2007-01-01	6755
2007-04-01	6893
2007-07-01	7246
2007-10-01	7930
2008-01-01	8540
2008-04-01	8321
2008-07-01	7625
2008-10-01	7411
2009-01-01	6977
2009-04-01	7569
2009-07-01	7833
2009-10-01	7693
2010-01-01	7750
2010-04-01	7120
2010-07-01	8990
2010-10-01	9057
2011-01-01	9571
2011-04-01	9748
2011-07-01	9649
2011-10-01	9343
2012-01-01	10707
2012-04-01	9510
2012-07-01	10638
2012-10-01	10857
2013-01-01	10472
2013-04-01	10885
2013-07-01	11746
2013-10-01	12098
2014-01-01	12462
2014-04-01	12459
2014-07-01	11373
2014-10-01	11581
2015-01-01	10743
2015-04-01	11262
2015-07-01	11669
2015-10-01	11496
2016-01-01	12634
2016-04-01	12380
2016-07-01	13037
2016-10-01	12358
2017-01-01	12983
2017-04-01	13969
2017-07-01	14774
2017-10-01	15500
2018-01-01	15716