Quarter	Millions of US Dollars
1989-01-01	9171
1989-04-01	9948
1989-07-01	10825
1989-10-01	11346
1990-01-01	11411
1990-04-01	11463
1990-07-01	12471
1990-10-01	12734
1991-01-01	14052
1991-04-01	14599
1991-07-01	14937
1991-10-01	14661
1992-01-01	14970
1992-04-01	15418
1992-07-01	14637
1992-10-01	14286
1993-01-01	15152
1993-04-01	15088
1993-07-01	14782
1993-10-01	15432
1994-01-01	14825
1994-04-01	14735
1994-07-01	15345
1994-10-01	15194
1995-01-01	15200
1995-04-01	16307
1995-07-01	17472
1995-10-01	17951
1996-01-01	18070
1996-04-01	19451
1996-07-01	20222
1996-10-01	22337
1997-01-01	24241
1997-04-01	26169
1997-07-01	29022
1997-10-01	28287
1998-01-01	29066
1998-04-01	29503
1998-07-01	29609
1998-10-01	30352
1999-01-01	32949
1999-04-01	37109
1999-07-01	37916
1999-10-01	38796
2000-01-01	40193
2000-04-01	42717
2000-07-01	43978
2000-10-01	45576
2001-01-01	45262
2001-04-01	48099
2001-07-01	47946
2001-10-01	48514
2002-01-01	49885
2002-04-01	54996
2002-07-01	53253
2002-10-01	54260
2003-01-01	61883
2003-04-01	69113
2003-07-01	73894
2003-10-01	81294
2004-01-01	82891
2004-04-01	83517
2004-07-01	92342
2004-10-01	102421
2005-01-01	105766
2005-04-01	105588
2005-07-01	113745
2005-10-01	117642
2006-01-01	121891
2006-04-01	130318
2006-07-01	129306
2006-10-01	125591
2007-01-01	125798
2007-04-01	144018
2007-07-01	158921
2007-10-01	164565
2008-01-01	165116
2008-04-01	173444
2008-07-01	166540
2008-10-01	140036
2009-01-01	135713
2009-04-01	144745
2009-07-01	156020
2009-10-01	159519
2010-01-01	168437
2010-04-01	167571
2010-07-01	169619
2010-10-01	184758
2011-01-01	191192
2011-04-01	190631
2011-07-01	175758
2011-10-01	183307
2012-01-01	200939
2012-04-01	196073
2012-07-01	204721
2012-10-01	208606
2013-01-01	213571
2013-04-01	208361
2013-07-01	222663
2013-10-01	219343
2014-01-01	216878
2014-04-01	228852
2014-07-01	223760
2014-10-01	217684
2015-01-01	201184
2015-04-01	208124
2015-07-01	194038
2015-10-01	189566
2016-01-01	207658
2016-04-01	208610
2016-07-01	210223
2016-10-01	203332
2017-01-01	204484
2017-04-01	208362
2017-07-01	219061
2017-10-01	219425
2018-01-01	211640