Quarter	Millions of US Dollars
1989-10-01	45207
1990-01-01	45337
1990-04-01	47124
1990-07-01	52744
1990-10-01	55208
1991-01-01	47790
1991-04-01	45412
1991-07-01	51726
1991-10-01	56733
1992-01-01	53240
1992-04-01	59942
1992-07-01	69512
1992-10-01	60900
1993-01-01	62465
1993-04-01	62387
1993-07-01	69365
1993-10-01	65830
1994-01-01	70037
1994-04-01	75226
1994-07-01	77737
1994-10-01	80107
1995-01-01	96264
1995-04-01	99963
1995-07-01	100109
1995-10-01	95823
1996-01-01	94159
1996-04-01	93918
1996-07-01	94214
1996-10-01	92270
1997-01-01	87829
1997-04-01	85957
1997-07-01	86447
1997-10-01	86323
1998-01-01	85649
1998-04-01	88474
1998-07-01	94958
1998-10-01	95094
1999-01-01	90321
1999-04-01	88666
1999-07-01	92928
1999-10-01	92444
2000-01-01	92647
2000-04-01	97409
2000-07-01	95158
2000-10-01	101989
2001-01-01	103074
2001-04-01	101493
2001-07-01	108146
2001-10-01	111757
2002-01-01	116533
2002-04-01	135252
2002-07-01	133121
2002-10-01	140956
2003-01-01	146185
2003-04-01	154558
2003-07-01	162938
2003-10-01	176690
2004-01-01	178553
2004-04-01	181196
2004-07-01	187325
2004-10-01	209745
2005-01-01	208517
2005-04-01	201636
2005-07-01	202858
2005-10-01	208705
2006-01-01	221972
2006-04-01	235297
2006-07-01	240386
2006-10-01	263188
2007-01-01	288989
2007-04-01	298772
2007-07-01	311938
2007-10-01	330926
2008-01-01	362993
2008-04-01	372194
2008-07-01	356745
2008-10-01	373790
2009-01-01	357123
2009-04-01	382314
2009-07-01	395688
2009-10-01	380068
2010-01-01	356766
2010-04-01	323116
2010-07-01	357112
2010-10-01	343950
2011-01-01	364783
2011-04-01	367315
2011-07-01	347070
2011-10-01	330758
2012-01-01	334118
2012-04-01	305364
2012-07-01	311138
2012-10-01	303515
2013-01-01	286691
2013-04-01	290060
2013-07-01	290612
2013-10-01	297868
2014-01-01	290336
2014-04-01	285718
2014-07-01	259656
2014-10-01	235542
2015-01-01	202918
2015-04-01	202636
2015-07-01	200341
2015-10-01	192462
2016-01-01	198383
2016-04-01	187063
2016-07-01	181077
2016-10-01	164570
2017-01-01	166222
2017-04-01	172548
2017-07-01	166175
2017-10-01	165915
2018-01-01	170592