Quarter	Millions of US Dollars
1989-10-01	95287
1990-01-01	98275
1990-04-01	104251
1990-07-01	111476
1990-10-01	120612
1991-01-01	110143
1991-04-01	109515
1991-07-01	120615
1991-10-01	134403
1992-01-01	131102
1992-04-01	147110
1992-07-01	161683
1992-10-01	142362
1993-01-01	147370
1993-04-01	144872
1993-07-01	154474
1993-10-01	145329
1994-01-01	154423
1994-04-01	162236
1994-07-01	166095
1994-10-01	169214
1995-01-01	199877
1995-04-01	200291
1995-07-01	194453
1995-10-01	205519
1996-01-01	205739
1996-04-01	199605
1996-07-01	201392
1996-10-01	202230
1997-01-01	188941
1997-04-01	186114
1997-07-01	183934
1997-10-01	179784
1998-01-01	181901
1998-04-01	191324
1998-07-01	204749
1998-10-01	202530
1999-01-01	191442
1999-04-01	188460
1999-07-01	195832
1999-10-01	182966
2000-01-01	184356
2000-04-01	177766
2000-07-01	163580
2000-10-01	165296
2001-01-01	159387
2001-04-01	158902
2001-07-01	168462
2001-10-01	159489
2002-01-01	160087
2002-04-01	187168
2002-07-01	186880
2002-10-01	198346
2003-01-01	214010
2003-04-01	223990
2003-07-01	238372
2003-10-01	257035
2004-01-01	256578
2004-04-01	260972
2004-07-01	272793
2004-10-01	293293
2005-01-01	277188
2005-04-01	275800
2005-07-01	268766
2005-10-01	260153
2006-01-01	265884
2006-04-01	282195
2006-07-01	279590
2006-10-01	278845
2007-01-01	287728
2007-04-01	301425
2007-07-01	312270
2007-10-01	307626
2008-01-01	341364
2008-04-01	351922
2008-07-01	317027
2008-10-01	394870
2009-01-01	366634
2009-04-01	369514
2009-07-01	399956
2009-10-01	389416
2010-01-01	373454
2010-04-01	348962
2010-07-01	395807
2010-10-01	393539
2011-01-01	419524
2011-04-01	446825
2011-07-01	417392
2011-10-01	401320
2012-01-01	419383
2012-04-01	404037
2012-07-01	418976
2012-10-01	438175
2013-01-01	432657
2013-04-01	462183
2013-07-01	479215
2013-10-01	481345
2014-01-01	482030
2014-04-01	498271
2014-07-01	455967
2014-10-01	434213
2015-01-01	385126
2015-04-01	397594
2015-07-01	396726
2015-10-01	380006
2016-01-01	396760
2016-04-01	382132
2016-07-01	378456
2016-10-01	360434
2017-01-01	359432
2017-04-01	381754
2017-07-01	387100
2017-10-01	398923
2018-01-01	399982