Quarter	Millions of US Dollars
1995-01-01	4992
1995-04-01	4942
1995-07-01	4638
1995-10-01	5183
1996-01-01	4628
1996-04-01	5353
1996-07-01	5021
1996-10-01	7853
1997-01-01	8683
1997-04-01	7073
1997-07-01	5149
1997-10-01	1513
1998-01-01	2033
1998-04-01	3222
1998-07-01	4554
1998-10-01	5329
1999-01-01	5652
1999-04-01	25163
1999-07-01	21074
1999-10-01	45330
2000-01-01	45507
2000-04-01	49391
2000-07-01	52178
2000-10-01	47048
2001-01-01	45111
2001-04-01	42176
2001-07-01	49031
2001-10-01	43044
2002-01-01	50677
2002-04-01	57606
2002-07-01	55121
2002-10-01	52698
2003-01-01	57103
2003-04-01	61481
2003-07-01	61450
2003-10-01	59038
2004-01-01	61729
2004-04-01	53433
2004-07-01	49983
2004-10-01	54158
2005-01-01	56593
2005-04-01	51797
2005-07-01	43528
2005-10-01	48268
2006-01-01	58844
2006-04-01	62073
2006-07-01	65603
2006-10-01	69885
2007-01-01	74794
2007-04-01	78895
2007-07-01	80761
2007-10-01	77261
2008-01-01	109417
2008-04-01	100671
2008-07-01	89834
2008-10-01	88072
2009-01-01	92327
2009-04-01	107131
2009-07-01	112418
2009-10-01	124928
2010-01-01	141272
2010-04-01	138351
2010-07-01	140386
2010-10-01	128747
2011-01-01	144356
2011-04-01	139354
2011-07-01	124495
2011-10-01	119998
2012-01-01	111186
2012-04-01	112501
2012-07-01	104881
2012-10-01	114194
2013-01-01	119240
2013-04-01	119801
2013-07-01	108128
2013-10-01	108628
2014-01-01	124413
2014-04-01	127065
2014-07-01	129488
2014-10-01	136599
2015-01-01	138734
2015-04-01	135029
2015-07-01	136387
2015-10-01	145400
2016-01-01	169111
2016-04-01	177004
2016-07-01	190299
2016-10-01	184481
2017-01-01	200498
2017-04-01	205799
2017-07-01	210610
2017-10-01	218295
2018-01-01	226193