Quarter	Millions of US Dollars
1989-10-01	1903
1990-01-01	3419
1990-04-01	4536
1990-07-01	3649
1990-10-01	3430
1991-01-01	2991
1991-04-01	2543
1991-07-01	4634
1991-10-01	3861
1992-01-01	6452
1992-04-01	8186
1992-07-01	8861
1992-10-01	6517
1993-01-01	5928
1993-04-01	5318
1993-07-01	5261
1993-10-01	4118
1994-01-01	4529
1994-04-01	4370
1994-07-01	4665
1994-10-01	16162
1995-01-01	18632
1995-04-01	18656
1995-07-01	18203
1995-10-01	18403
1996-01-01	18200
1996-04-01	18813
1996-07-01	19177
1996-10-01	19389
1997-01-01	19852
1997-04-01	24866
1997-07-01	23908
1997-10-01	23408
1998-01-01	26705
1998-04-01	25068
1998-07-01	26430
1998-10-01	26484
1999-01-01	24076
1999-04-01	23774
1999-07-01	26290
1999-10-01	24514
2000-01-01	24302
2000-04-01	24808
2000-07-01	24112
2000-10-01	26186
2001-01-01	26267
2001-04-01	26109
2001-07-01	28703
2001-10-01	27300
2002-01-01	27699
2002-04-01	31556
2002-07-01	30677
2002-10-01	31670
2003-01-01	35597
2003-04-01	35719
2003-07-01	36669
2003-10-01	42497
2004-01-01	41333
2004-04-01	40821
2004-07-01	41909
2004-10-01	45569
2005-01-01	39996
2005-04-01	33576
2005-07-01	34337
2005-10-01	30797
2006-01-01	31345
2006-04-01	33611
2006-07-01	35198
2006-10-01	39904
2007-01-01	44334
2007-04-01	56435
2007-07-01	62508
2007-10-01	70901
2008-01-01	81182
2008-04-01	98816
2008-07-01	94020
2008-10-01	95654
2009-01-01	106188
2009-04-01	123387
2009-07-01	132989
2009-10-01	143703
2010-01-01	141583
2010-04-01	129372
2010-07-01	150503
2010-10-01	158907
2011-01-01	180120
2011-04-01	187475
2011-07-01	180491
2011-10-01	182516
2012-01-01	180512
2012-04-01	167930
2012-07-01	173860
2012-10-01	175599
2013-01-01	164577
2013-04-01	161574
2013-07-01	164498
2013-10-01	164932
2014-01-01	156797
2014-04-01	150653
2014-07-01	130590
2014-10-01	119102
2015-01-01	104342
2015-04-01	97154
2015-07-01	93169
2015-10-01	91132
2016-01-01	92608
2016-04-01	89488
2016-07-01	89277
2016-10-01	80918
2017-01-01	80159
2017-04-01	82159
2017-07-01	84970
2017-10-01	87137
2018-01-01	89466