Quarter	Millions of US Dollars
1989-10-01	890049
1990-01-01	926478
1990-04-01	978591
1990-07-01	1047599
1990-10-01	1138342
1991-01-01	1041462
1991-04-01	1019420
1991-07-01	1139206
1991-10-01	1272730
1992-01-01	1223926
1992-04-01	1361531
1992-07-01	1280075
1992-10-01	1102272
1993-01-01	1051063
1993-04-01	1121690
1993-07-01	1114783
1993-10-01	1072126
1994-01-01	1173763
1994-04-01	1224865
1994-07-01	1269488
1994-10-01	1299039
1995-01-01	1259969
1995-04-01	1327872
1995-07-01	1361438
1995-10-01	1398114
1996-01-01	1399779
1996-04-01	1463044
1996-07-01	1506999
1996-10-01	1537668
1997-01-01	1435202
1997-04-01	1435502
1997-07-01	1439382
1997-10-01	1418829
1998-01-01	1391659
1998-04-01	1461693
1998-07-01	1585267
1998-10-01	1581089
1999-01-01	1475873
1999-04-01	1448371
1999-07-01	1500987
1999-10-01	1407270
2000-01-01	1371582
2000-04-01	1398235
2000-07-01	1296305
2000-10-01	1365690
2001-01-01	1340756
2001-04-01	1321715
2001-07-01	1425137
2001-10-01	1390106
2002-01-01	1425964
2002-04-01	1657514
2002-07-01	1653246
2002-10-01	1724807
2003-01-01	1845796
2003-04-01	1959996
2003-07-01	2021417
2003-10-01	2163684
2004-01-01	2169195
2004-04-01	2224025
2004-07-01	2286833
2004-10-01	2477471
2005-01-01	2453945
2005-04-01	2360093
2005-07-01	2325891
2005-10-01	2278786
2006-01-01	2400711
2006-04-01	2587019
2006-07-01	2585582
2006-10-01	2691963
2007-01-01	2789912
2007-04-01	2913243
2007-07-01	3053629
2007-10-01	3178383
2008-01-01	3545344
2008-04-01	3622464
2008-07-01	3335290
2008-10-01	3367520
2009-01-01	3401897
2009-04-01	3652012
2009-07-01	3890397
2009-10-01	3809367
2010-01-01	3609107
2010-04-01	3299075
2010-07-01	3688836
2010-10-01	3593057
2011-01-01	3874059
2011-04-01	3977905
2011-07-01	3718277
2011-10-01	3686375
2012-01-01	3904952
2012-04-01	3685306
2012-07-01	3825506
2012-10-01	3894596
2013-01-01	3803450
2013-04-01	3914446
2013-07-01	4014463
2013-10-01	4075478
2014-01-01	4065780
2014-04-01	4053984
2014-07-01	3654977
2014-10-01	3468173
2015-01-01	3083792
2015-04-01	3177442
2015-07-01	3144617
2015-10-01	3007703
2016-01-01	3155577
2016-04-01	3107885
2016-07-01	3074388
2016-10-01	2890555
2017-01-01	2962952
2017-04-01	3157728
2017-07-01	3260169
2017-10-01	3299243
2018-01-01	3390759