Quarter	Millions of US Dollars
1989-10-01	148060
1990-01-01	146570
1990-04-01	164530
1990-07-01	176511
1990-10-01	185228
1991-01-01	176298
1991-04-01	158288
1991-07-01	180308
1991-10-01	196727
1992-01-01	182439
1992-04-01	202267
1992-07-01	191042
1992-10-01	182145
1993-01-01	178900
1993-04-01	177824
1993-07-01	198531
1993-10-01	200303
1994-01-01	211703
1994-04-01	217595
1994-07-01	229672
1994-10-01	239071
1995-01-01	253351
1995-04-01	281506
1995-07-01	289740
1995-10-01	297170
1996-01-01	300870
1996-04-01	294597
1996-07-01	303068
1996-10-01	316731
1997-01-01	291812
1997-04-01	295282
1997-07-01	298385
1997-10-01	297562
1998-01-01	300329
1998-04-01	312958
1998-07-01	342999
1998-10-01	333044
1999-01-01	312196
1999-04-01	302661
1999-07-01	313493
1999-10-01	304838
2000-01-01	291172
2000-04-01	292416
2000-07-01	272335
2000-10-01	294573
2001-01-01	278168
2001-04-01	270361
2001-07-01	292567
2001-10-01	283189
2002-01-01	280850
2002-04-01	325681
2002-07-01	322930
2002-10-01	346610
2003-01-01	358197
2003-04-01	384070
2003-07-01	386843
2003-10-01	418260
2004-01-01	415887
2004-04-01	415627
2004-07-01	421887
2004-10-01	461614
2005-01-01	441044
2005-04-01	418792
2005-07-01	414739
2005-10-01	408475
2006-01-01	419684
2006-04-01	435239
2006-07-01	440096
2006-10-01	451576
2007-01-01	467388
2007-04-01	476867
2007-07-01	493505
2007-10-01	497562
2008-01-01	528510
2008-04-01	540788
2008-07-01	516859
2008-10-01	542939
2009-01-01	562809
2009-04-01	649804
2009-07-01	708095
2009-10-01	746059
2010-01-01	720913
2010-04-01	682154
2010-07-01	775835
2010-10-01	795706
2011-01-01	897414
2011-04-01	937867
2011-07-01	877625
2011-10-01	871140
2012-01-01	944019
2012-04-01	879329
2012-07-01	923851
2012-10-01	973208
2013-01-01	992845
2013-04-01	1055452
2013-07-01	1100898
2013-10-01	1134970
2014-01-01	1168096
2014-04-01	1179958
2014-07-01	1095471
2014-10-01	1056561
2015-01-01	957459
2015-04-01	1006309
2015-07-01	1023277
2015-10-01	998446
2016-01-01	1066877
2016-04-01	1040802
2016-07-01	1052802
2016-10-01	993429
2017-01-01	1027571
2017-04-01	1107696
2017-07-01	1150780
2017-10-01	1186203
2018-01-01	1238461