Quarter	Millions of US Dollars
1989-07-01	0
1989-10-01	0
1990-01-01	0
1990-04-01	0
1990-07-01	0
1990-10-01	0
1991-01-01	0
1991-04-01	0
1991-07-01	0
1991-10-01	0
1992-01-01	0
1992-04-01	0
1992-07-01	0
1992-10-01	0
1993-01-01	0
1993-04-01	0
1993-07-01	0
1993-10-01	0
1994-01-01	0
1994-04-01	0
1994-07-01	0
1994-10-01	0
1995-01-01	0
1995-04-01	0
1995-07-01	140
1995-10-01	140
1996-01-01	136
1996-04-01	131
1996-07-01	0
1996-10-01	0
1997-01-01	0
1997-04-01	0
1997-07-01	0
1997-10-01	0
1998-01-01	0
1998-04-01	0
1998-07-01	0
1998-10-01	53
1999-01-01	50
1999-04-01	50
1999-07-01	57
1999-10-01	0
2000-01-01	0
2000-04-01	0
2000-07-01	16
2000-10-01	16
2001-01-01	375
2001-04-01	1734
2001-07-01	1790
2001-10-01	2657
2002-01-01	2348
2002-04-01	988
2002-07-01	970
2002-10-01	102
2003-01-01	61
2003-04-01	61
2003-07-01	700
2003-10-01	700
2004-01-01	1779
2004-04-01	1779
2004-07-01	1698
2004-10-01	1980
2005-01-01	877
2005-04-01	859
2005-07-01	58
2005-10-01	47
2006-01-01	351
2006-04-01	369
2006-07-01	317
2006-10-01	329
2007-01-01	266
2007-04-01	278
2007-07-01	292
2007-10-01	303
2008-01-01	9
2008-04-01	0
2008-07-01	48
2008-10-01	178
2009-01-01	173
2009-04-01	75
2009-07-01	415
2009-10-01	382
2010-01-01	357
2010-04-01	325
2010-07-01	0
2010-10-01	134
2011-01-01	142
2011-04-01	145
2011-07-01	135
2011-10-01	0
2012-01-01	1091
2012-04-01	1438
2012-07-01	1476
2012-10-01	1507
2013-01-01	416
2013-04-01	0
2013-07-01	150
2013-10-01	150
2014-01-01	660
2014-04-01	660
2014-07-01	592
2014-10-01	589
2015-01-01	70
2015-04-01	124
2015-07-01	52
2015-10-01	72
2016-01-01	87
2016-04-01	31
2016-07-01	1092
2016-10-01	1031
2017-01-01	1047
2017-04-01	1118
2017-07-01	35
2017-10-01	1115
2018-01-01	1146
2018-04-01	1084