Quarter	Millions of US Dollars
1989-10-01	679757
1990-01-01	731719
1990-04-01	767005
1990-07-01	846567
1990-10-01	934147
1991-01-01	857064
1991-04-01	838158
1991-07-01	926985
1991-10-01	1024086
1992-01-01	1001785
1992-04-01	1115689
1992-07-01	1247583
1992-10-01	1096535
1993-01-01	1169862
1993-04-01	1142108
1993-07-01	1169920
1993-10-01	1123936
1994-01-01	1189555
1994-04-01	1241687
1994-07-01	1305294
1994-10-01	1291984
1995-01-01	1466913
1995-04-01	1475034
1995-07-01	1478215
1995-10-01	1461036
1996-01-01	1452033
1996-04-01	1442530
1996-07-01	1464673
1996-10-01	1426013
1997-01-01	1340887
1997-04-01	1320200
1997-07-01	1322563
1997-10-01	1297066
1998-01-01	1281463
1998-04-01	1306495
1998-07-01	1431736
1998-10-01	1426846
1999-01-01	1359174
1999-04-01	1316683
1999-07-01	1393643
1999-10-01	1327958
2000-01-01	1277364
2000-04-01	1306381
2000-07-01	1232861
2000-10-01	1314602
2001-01-01	1301791
2001-04-01	1293360
2001-07-01	1407288
2001-10-01	1368052
2002-01-01	1405681
2002-04-01	1635286
2002-07-01	1599887
2002-10-01	1713272
2003-01-01	1852364
2003-04-01	1995173
2003-07-01	2058308
2003-10-01	2221969
2004-01-01	2202775
2004-04-01	2242037
2004-07-01	2303957
2004-10-01	2576372
2005-01-01	2514274
2005-04-01	2401560
2005-07-01	2405450
2005-10-01	2382289
2006-01-01	2500690
2006-04-01	2644645
2006-07-01	2674901
2006-10-01	2837852
2007-01-01	2956162
2007-04-01	3099691
2007-07-01	3311782
2007-10-01	3514700
2008-01-01	3851230
2008-04-01	3929984
2008-07-01	3639793
2008-10-01	3729670
2009-01-01	3702197
2009-04-01	4072849
2009-07-01	4192939
2009-10-01	4160954
2010-01-01	4030921
2010-04-01	3772643
2010-07-01	4206633
2010-10-01	4137682
2011-01-01	4492800
2011-04-01	4683557
2011-07-01	4459934
2011-10-01	4361743
2012-01-01	4650915
2012-04-01	4420721
2012-07-01	4496254
2012-10-01	4512777
2013-01-01	4425866
2013-04-01	4548327
2013-07-01	4668702
2013-10-01	4741858
2014-01-01	4880199
2014-04-01	4948611
2014-07-01	4586137
2014-10-01	4376400
2015-01-01	3999376
2015-04-01	4121203
2015-07-01	4095225
2015-10-01	3986572
2016-01-01	4204947
2016-04-01	4154862
2016-07-01	4184863
2016-10-01	3949689
2017-01-01	4094750
2017-04-01	4393266
2017-07-01	4556762
2017-10-01	4597499
2018-01-01	4817275