Quarter	Millions of US Dollars
1989-10-01	92157
1990-01-01	107510
1990-04-01	116055
1990-07-01	130916
1990-10-01	130130
1991-01-01	119932
1991-04-01	114963
1991-07-01	130826
1991-10-01	142071
1992-01-01	142538
1992-04-01	156704
1992-07-01	167313
1992-10-01	146842
1993-01-01	154467
1993-04-01	153291
1993-07-01	156332
1993-10-01	146399
1994-01-01	157190
1994-04-01	163865
1994-07-01	170797
1994-10-01	164573
1995-01-01	179827
1995-04-01	181965
1995-07-01	181375
1995-10-01	179564
1996-01-01	182497
1996-04-01	179027
1996-07-01	180906
1996-10-01	179072
1997-01-01	171707
1997-04-01	161748
1997-07-01	166033
1997-10-01	160351
1998-01-01	162877
1998-04-01	166381
1998-07-01	181957
1998-10-01	184773
1999-01-01	185288
1999-04-01	187845
1999-07-01	202897
1999-10-01	196297
2000-01-01	189427
2000-04-01	199667
2000-07-01	191676
2000-10-01	216933
2001-01-01	228908
2001-04-01	230824
2001-07-01	256856
2001-10-01	252309
2002-01-01	243466
2002-04-01	268533
2002-07-01	266600
2002-10-01	283943
2003-01-01	312121
2003-04-01	333208
2003-07-01	336650
2003-10-01	358147
2004-01-01	345603
2004-04-01	349754
2004-07-01	357105
2004-10-01	373100
2005-01-01	360179
2005-04-01	343148
2005-07-01	342296
2005-10-01	325599
2006-01-01	315052
2006-04-01	337066
2006-07-01	334664
2006-10-01	350067
2007-01-01	356962
2007-04-01	375449
2007-07-01	384374
2007-10-01	382327
2008-01-01	406739
2008-04-01	430150
2008-07-01	392451
2008-10-01	393322
2009-01-01	393491
2009-04-01	448129
2009-07-01	479452
2009-10-01	474988
2010-01-01	466407
2010-04-01	438416
2010-07-01	493443
2010-10-01	483196
2011-01-01	520609
2011-04-01	536958
2011-07-01	516701
2011-10-01	506980
2012-01-01	547918
2012-04-01	545655
2012-07-01	568161
2012-10-01	582777
2013-01-01	579816
2013-04-01	589665
2013-07-01	623954
2013-10-01	629247
2014-01-01	656192
2014-04-01	685221
2014-07-01	650239
2014-10-01	624426
2015-01-01	586790
2015-04-01	607368
2015-07-01	612712
2015-10-01	601099
2016-01-01	620182
2016-04-01	623501
2016-07-01	642715
2016-10-01	623938
2017-01-01	649174
2017-04-01	697383
2017-07-01	723638
2017-10-01	721788
2018-01-01	766590