Quarter	Millions of US Dollars
1989-01-01	59341
1989-04-01	61800
1989-07-01	68524
1989-10-01	70448
1990-01-01	73027
1990-04-01	74585
1990-07-01	76148
1990-10-01	76844
1991-01-01	77484
1991-04-01	80937
1991-07-01	83549
1991-10-01	82630
1992-01-01	81583
1992-04-01	82264
1992-07-01	80269
1992-10-01	79657
1993-01-01	81183
1993-04-01	82444
1993-07-01	82015
1993-10-01	81851
1994-01-01	82845
1994-04-01	83156
1994-07-01	86317
1994-10-01	85550
1995-01-01	86348
1995-04-01	89520
1995-07-01	95008
1995-10-01	97305
1996-01-01	98610
1996-04-01	101624
1996-07-01	103197
1996-10-01	105110
1997-01-01	108377
1997-04-01	110750
1997-07-01	116853
1997-10-01	117676
1998-01-01	123583
1998-04-01	127550
1998-07-01	129867
1998-10-01	126211
1999-01-01	132811
1999-04-01	136839
1999-07-01	143675
1999-10-01	145022
2000-01-01	148218
2000-04-01	151869
2000-07-01	153917
2000-10-01	154321
2001-01-01	154936
2001-04-01	164853
2001-07-01	167521
2001-10-01	172708
2002-01-01	177578
2002-04-01	180018
2002-07-01	175535
2002-10-01	172171
2003-01-01	180643
2003-04-01	186430
2003-07-01	187032
2003-10-01	196473
2004-01-01	194878
2004-04-01	193091
2004-07-01	199739
2004-10-01	211454
2005-01-01	211738
2005-04-01	210855
2005-07-01	217747
2005-10-01	216182
2006-01-01	212882
2006-04-01	214685
2006-07-01	217927
2006-10-01	217872
2007-01-01	222802
2007-04-01	235093
2007-07-01	242179
2007-10-01	248231
2008-01-01	245988
2008-04-01	260400
2008-07-01	259845
2008-10-01	233106
2009-01-01	236587
2009-04-01	263636
2009-07-01	275610
2009-10-01	287701
2010-01-01	299057
2010-04-01	299846
2010-07-01	309503
2010-10-01	325646
2011-01-01	338740
2011-04-01	347284
2011-07-01	337639
2011-10-01	342893
2012-01-01	354942
2012-04-01	354617
2012-07-01	370835
2012-10-01	383665
2013-01-01	387519
2013-04-01	391678
2013-07-01	398324
2013-10-01	402456
2014-01-01	405317
2014-04-01	427933
2014-07-01	432879
2014-10-01	430146
2015-01-01	425600
2015-04-01	435459
2015-07-01	421683
2015-10-01	416038
2016-01-01	430948
2016-04-01	431886
2016-07-01	431222
2016-10-01	436025
2017-01-01	448559
2017-04-01	467852
2017-07-01	494165
2017-10-01	500597
2018-01-01	502027