Quarter	Millions of US Dollars
1978-01-01	0
1978-04-01	0
1978-07-01	0
1978-10-01	0
1979-01-01	0
1979-04-01	0
1979-07-01	0
1979-10-01	0
1980-01-01	0
1980-04-01	0
1980-07-01	0
1980-10-01	0
1981-01-01	0
1981-04-01	0
1981-07-01	0
1981-10-01	0
1982-01-01	21
1982-04-01	20
1982-07-01	20
1982-10-01	21
1983-01-01	30
1983-04-01	30
1983-07-01	30
1983-10-01	30
1984-01-01	0
1984-04-01	0
1984-07-01	0
1984-10-01	4
1985-01-01	4
1985-04-01	44
1985-07-01	92
1985-10-01	95
1986-01-01	106
1986-04-01	55
1986-07-01	0
1986-10-01	0
1987-01-01	0
1987-04-01	68
1987-07-01	68
1987-10-01	82
1988-01-01	81
1988-04-01	75
1988-07-01	74
1988-10-01	80
1989-01-01	220
1989-04-01	445
1989-07-01	517
1989-10-01	515
1990-01-01	363
1990-04-01	66
1990-07-01	72
1990-10-01	147
1991-01-01	142
1991-04-01	145
1991-07-01	75
1991-10-01	0
1992-01-01	0
1992-04-01	0
1992-07-01	142
1992-10-01	124
1993-01-01	124
1993-04-01	118
1993-07-01	0
1993-10-01	0
1994-01-01	134
1994-04-01	192
1994-07-01	317
1994-10-01	332
1995-01-01	363
1995-04-01	329
1995-07-01	219
1995-10-01	139
1996-01-01	231
1996-04-01	204
1996-07-01	220
1996-10-01	206
1997-01-01	81
1997-04-01	87
1997-07-01	0
1997-10-01	0
1998-01-01	0
1998-04-01	100
1998-07-01	340
1998-10-01	240
1999-01-01	408
1999-04-01	405
1999-07-01	239
1999-10-01	246
2000-01-01	60
2000-04-01	438
2000-07-01	104
2000-10-01	508
2001-01-01	761
2001-04-01	960
2001-07-01	1020
2001-10-01	739
2002-01-01	412
2002-04-01	427
2002-07-01	1712
2002-10-01	1414
2003-01-01	1386
2003-04-01	1299
2003-07-01	886
2003-10-01	1142
2004-01-01	586
2004-04-01	482
2004-07-01	701
2004-10-01	962
2005-01-01	1095
2005-04-01	1369
2005-07-01	523
2005-10-01	655
2006-01-01	375
2006-04-01	2485
2006-07-01	2658
2006-10-01	1943
2007-01-01	1941
2007-04-01	1029
2007-07-01	1068
2007-10-01	992
2008-01-01	1113
2008-04-01	323
2008-07-01	324
2008-10-01	299
2009-01-01	125
2009-04-01	127
2009-07-01	134
2009-10-01	0
2010-01-01	0
2010-04-01	282
2010-07-01	300
2010-10-01	307
2011-01-01	302
2011-04-01	0
2011-07-01	0
2011-10-01	0
2012-01-01	0
2012-04-01	251
2012-07-01	258
2012-10-01	232
2013-01-01	212
2013-04-01	0
2013-07-01	0
2013-10-01	0
2014-01-01	0
2014-04-01	99
2014-07-01	91
2014-10-01	84
2015-01-01	83
2015-04-01	50
2015-07-01	150
2015-10-01	100
2016-01-01	150
2016-04-01	150
2016-07-01	272
2016-10-01	255
2017-01-01	150
2017-04-01	150
2017-07-01	130
2017-10-01	130