Quarter	Millions of US Dollars
1984-07-01	0
1984-10-01	0
1985-01-01	0
1985-04-01	0
1985-07-01	0
1985-10-01	0
1986-01-01	50
1986-04-01	50
1986-07-01	50
1986-10-01	50
1987-01-01	0
1987-04-01	0
1987-07-01	0
1987-10-01	0
1988-01-01	0
1988-04-01	0
1988-07-01	0
1988-10-01	0
1989-01-01	0
1989-04-01	0
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	100
1992-07-01	100
1992-10-01	100
1993-01-01	147
1993-04-01	49
1993-07-01	147
1993-10-01	143
1994-01-01	349
1994-04-01	363
1994-07-01	738
1994-10-01	737
1995-01-01	464
1995-04-01	464
1995-07-01	1035
1995-10-01	1061
1996-01-01	998
1996-04-01	1042
1996-07-01	0
1996-10-01	70
1997-01-01	169
1997-04-01	274
1997-07-01	425
1997-10-01	847
1998-01-01	404
1998-04-01	610
1998-07-01	715
1998-10-01	761
1999-01-01	775
1999-04-01	861
1999-07-01	1675
1999-10-01	1406
2000-01-01	1456
2000-04-01	1678
2000-07-01	611
2000-10-01	1640
2001-01-01	1465
2001-04-01	1530
2001-07-01	1530
2001-10-01	1130
2002-01-01	1326
2002-04-01	2283
2002-07-01	2278
2002-10-01	2251
2003-01-01	3443
2003-04-01	1936
2003-07-01	2238
2003-10-01	2615
2004-01-01	2283
2004-04-01	2136
2004-07-01	5725
2004-10-01	5704
2005-01-01	5265
2005-04-01	6691
2005-07-01	3701
2005-10-01	4560
2006-01-01	5951
2006-04-01	8344
2006-07-01	10478
2006-10-01	10086
2007-01-01	9797
2007-04-01	8712
2007-07-01	9011
2007-10-01	10327
2008-01-01	13790
2008-04-01	13966
2008-07-01	13505
2008-10-01	15682
2009-01-01	16744
2009-04-01	18082
2009-07-01	18908
2009-10-01	16815
2010-01-01	13698
2010-04-01	13599
2010-07-01	14865
2010-10-01	14659
2011-01-01	15908
2011-04-01	17654
2011-07-01	13783
2011-10-01	15068
2012-01-01	20604
2012-04-01	19580
2012-07-01	26064
2012-10-01	25048
2013-01-01	35713
2013-04-01	33791
2013-07-01	33180
2013-10-01	31242
2014-01-01	18976
2014-04-01	20091
2014-07-01	21124
2014-10-01	25433
2015-01-01	22339
2015-04-01	20217
2015-07-01	18237
2015-10-01	14814
2016-01-01	25214
2016-04-01	36328
2016-07-01	35381
2016-10-01	40799
2017-01-01	41163
2017-04-01	39236
2017-07-01	46690
2017-10-01	44420
2018-01-01	33698
2018-04-01	27586