Quarter	Millions of US Dollars
2000-01-01	1723
2000-04-01	1792
2000-07-01	1892
2000-10-01	1959
2001-01-01	1993
2001-04-01	2070
2001-07-01	2194
2001-10-01	2365
2002-01-01	2330
2002-04-01	2828
2002-07-01	2816
2002-10-01	3284
2003-01-01	3564
2003-04-01	3928
2003-07-01	3917
2003-10-01	4125
2004-01-01	4336
2004-04-01	4648
2004-07-01	4919
2004-10-01	5789
2005-01-01	6700
2005-04-01	6329
2005-07-01	6564
2005-10-01	6683
2006-01-01	7145
2006-04-01	7568
2006-07-01	7847
2006-10-01	8593
2007-01-01	9153
2007-04-01	9266
2007-07-01	9586
2007-10-01	10288
2008-01-01	11073
2008-04-01	10891
2008-07-01	9780
2008-10-01	10162
2009-01-01	9658
2009-04-01	10560
2009-07-01	11245
2009-10-01	11403
2010-01-01	11600
2010-04-01	10776
2010-07-01	12768
2010-10-01	12739
2011-01-01	13986
2011-04-01	13780
2011-07-01	13091
2011-10-01	12806
2012-01-01	14286
2012-04-01	12895
2012-07-01	13832
2012-10-01	14159
2013-01-01	14260
2013-04-01	14775
2013-07-01	15385
2013-10-01	16067
2014-01-01	16792
2014-04-01	16879
2014-07-01	15363
2014-10-01	15485
2015-01-01	13875
2015-04-01	14515
2015-07-01	14566
2015-10-01	14165
2016-01-01	15599
2016-04-01	14984
2016-07-01	15644
2016-10-01	14803
2017-01-01	15597
2017-04-01	16886
2017-07-01	17777
2017-10-01	18304
2018-01-01	19036