Quarter	Millions of US Dollars
1989-10-01	26990
1990-01-01	27541
1990-04-01	29809
1990-07-01	34460
1990-10-01	35535
1991-01-01	32404
1991-04-01	33705
1991-07-01	39331
1991-10-01	43037
1992-01-01	42167
1992-04-01	48276
1992-07-01	48332
1992-10-01	40538
1993-01-01	41602
1993-04-01	40181
1993-07-01	39068
1993-10-01	39003
1994-01-01	40987
1994-04-01	42665
1994-07-01	46743
1994-10-01	48350
1995-01-01	54402
1995-04-01	55338
1995-07-01	53356
1995-10-01	56414
1996-01-01	55962
1996-04-01	55195
1996-07-01	55915
1996-10-01	56436
1997-01-01	52805
1997-04-01	51339
1997-07-01	50379
1997-10-01	48469
1998-01-01	48471
1998-04-01	50229
1998-07-01	53549
1998-10-01	53107
1999-01-01	50167
1999-04-01	49472
1999-07-01	52925
1999-10-01	49709
2000-01-01	48561
2000-04-01	48074
2000-07-01	44633
2000-10-01	47593
2001-01-01	44752
2001-04-01	44850
2001-07-01	49847
2001-10-01	49807
2002-01-01	49306
2002-04-01	57800
2002-07-01	59709
2002-10-01	64699
2003-01-01	69393
2003-04-01	71634
2003-07-01	75752
2003-10-01	82847
2004-01-01	80585
2004-04-01	84341
2004-07-01	85826
2004-10-01	97675
2005-01-01	96163
2005-04-01	94422
2005-07-01	99550
2005-10-01	99639
2006-01-01	103028
2006-04-01	112189
2006-07-01	111662
2006-10-01	118452
2007-01-01	117405
2007-04-01	123940
2007-07-01	128278
2007-10-01	136241
2008-01-01	147021
2008-04-01	152608
2008-07-01	139533
2008-10-01	142347
2009-01-01	140953
2009-04-01	160917
2009-07-01	163415
2009-10-01	169740
2010-01-01	162186
2010-04-01	152283
2010-07-01	179341
2010-10-01	186506
2011-01-01	200660
2011-04-01	201654
2011-07-01	181755
2011-10-01	168485
2012-01-01	175001
2012-04-01	155011
2012-07-01	159123
2012-10-01	172854
2013-01-01	170099
2013-04-01	179357
2013-07-01	179041
2013-10-01	177876
2014-01-01	182784
2014-04-01	175846
2014-07-01	166686
2014-10-01	155794
2015-01-01	143276
2015-04-01	149648
2015-07-01	155435
2015-10-01	150211
2016-01-01	160794
2016-04-01	163387
2016-07-01	168636
2016-10-01	157364
2017-01-01	163737
2017-04-01	182462
2017-07-01	188889
2017-10-01	189569
2018-01-01	199613