Quarter	Millions of US Dollars
1989-01-01	409564
1989-04-01	425740
1989-07-01	443694
1989-10-01	459614
1990-01-01	461750
1990-04-01	476641
1990-07-01	494446
1990-10-01	499229
1991-01-01	511082
1991-04-01	529042
1991-07-01	548590
1991-10-01	537102
1992-01-01	522194
1992-04-01	537684
1992-07-01	522306
1992-10-01	509082
1993-01-01	523961
1993-04-01	531309
1993-07-01	517374
1993-10-01	527922
1994-01-01	514516
1994-04-01	525646
1994-07-01	548044
1994-10-01	523464
1995-01-01	530892
1995-04-01	553665
1995-07-01	578169
1995-10-01	573229
1996-01-01	580726
1996-04-01	584743
1996-07-01	587818
1996-10-01	585962
1997-01-01	594262
1997-04-01	598319
1997-07-01	603462
1997-10-01	593602
1998-01-01	608105
1998-04-01	601443
1998-07-01	576248
1998-10-01	568091
1999-01-01	600868
1999-04-01	620315
1999-07-01	630467
1999-10-01	651706
2000-01-01	659560
2000-04-01	659198
2000-07-01	649541
2000-10-01	654630
2001-01-01	626910
2001-04-01	647617
2001-07-01	630558
2001-10-01	629615
2002-01-01	633938
2002-04-01	677172
2002-07-01	646173
2002-10-01	645601
2003-01-01	700123
2003-04-01	763698
2003-07-01	772397
2003-10-01	814341
2004-01-01	809599
2004-04-01	795802
2004-07-01	845287
2004-10-01	902849
2005-01-01	919204
2005-04-01	907265
2005-07-01	967184
2005-10-01	981676
2006-01-01	1007730
2006-04-01	1057161
2006-07-01	1065833
2006-10-01	1043062
2007-01-01	1065097
2007-04-01	1159703
2007-07-01	1211240
2007-10-01	1226234
2008-01-01	1187555
2008-04-01	1208205
2008-07-01	1166607
2008-10-01	1040132
2009-01-01	1048958
2009-04-01	1154796
2009-07-01	1264752
2009-10-01	1302308
2010-01-01	1372674
2010-04-01	1355038
2010-07-01	1400282
2010-10-01	1477630
2011-01-01	1546174
2011-04-01	1588058
2011-07-01	1491117
2011-10-01	1538671
2012-01-01	1615779
2012-04-01	1605855
2012-07-01	1699965
2012-10-01	1696136
2013-01-01	1698952
2013-04-01	1685052
2013-07-01	1757540
2013-10-01	1708796
2014-01-01	1642947
2014-04-01	1734149
2014-07-01	1679903
2014-10-01	1619578
2015-01-01	1488397
2015-04-01	1556165
2015-07-01	1455189
2015-10-01	1420515
2016-01-01	1529134
2016-04-01	1556966
2016-07-01	1552806
2016-10-01	1523534
2017-01-01	1548067
2017-04-01	1632543
2017-07-01	1712212
2017-10-01	1699294
2018-01-01	1662282