Quarter	Millions of US Dollars
1974-10-01	0
1975-01-01	0
1975-04-01	0
1975-07-01	0
1975-10-01	0
1976-01-01	0
1976-04-01	0
1976-07-01	0
1976-10-01	0
1977-01-01	0
1977-04-01	0
1977-07-01	0
1977-10-01	0
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	0
1982-04-01	0
1982-07-01	0
1982-10-01	0
1983-01-01	0
1983-04-01	0
1983-07-01	0
1983-10-01	0
1984-01-01	0
1984-04-01	0
1984-07-01	0
1984-10-01	0
1985-01-01	12
1985-04-01	12
1985-07-01	14
1985-10-01	14
1986-01-01	0
1986-04-01	20
1986-07-01	21
1986-10-01	22
1987-01-01	23
1987-04-01	3
1987-07-01	3
1987-10-01	3
1988-01-01	98
1988-04-01	133
1988-07-01	126
1988-10-01	150
1989-01-01	57
1989-04-01	19
1989-07-01	19
1989-10-01	69
1990-01-01	71
1990-04-01	72
1990-07-01	79
1990-10-01	76
1991-01-01	66
1991-04-01	62
1991-07-01	67
1991-10-01	38
1992-01-01	34
1992-04-01	45
1992-07-01	50
1992-10-01	8
1993-01-01	8
1993-04-01	13
1993-07-01	14
1993-10-01	47
1994-01-01	35
1994-04-01	37
1994-07-01	39
1994-10-01	34
1995-01-01	158
1995-04-01	156
1995-07-01	398
1995-10-01	358
1996-01-01	317
1996-04-01	301
1996-07-01	80
1996-10-01	148
1997-01-01	75
1997-04-01	134
1997-07-01	135
1997-10-01	66
1998-01-01	58
1998-04-01	0
1998-07-01	0
1998-10-01	73
1999-01-01	134
1999-04-01	129
1999-07-01	134
1999-10-01	63
2000-01-01	0
2000-04-01	92
2000-07-01	86
2000-10-01	92
2001-01-01	87
2001-04-01	0
2001-07-01	62
2001-10-01	59
2002-01-01	119
2002-04-01	203
2002-07-01	135
2002-10-01	144
2003-01-01	149
2003-04-01	75
2003-07-01	75
2003-10-01	75
2004-01-01	0
2004-04-01	0
2004-07-01	0
2004-10-01	221
2005-01-01	209
2005-04-01	585
2005-07-01	580
2005-10-01	465
2006-01-01	470
2006-04-01	92
2006-07-01	93
2006-10-01	175
2007-01-01	175
2007-04-01	175
2007-07-01	351
2007-10-01	178
2008-01-01	293
2008-04-01	386
2008-07-01	169
2008-10-01	306
2009-01-01	181
2009-04-01	380
2009-07-01	398
2009-10-01	252
2010-01-01	434
2010-04-01	434
2010-07-01	483
2010-10-01	502
2011-01-01	295
2011-04-01	958
2011-07-01	888
2011-10-01	852
2012-01-01	887
2012-04-01	0
2012-07-01	267
2012-10-01	273
2013-01-01	525
2013-04-01	848
2013-07-01	608
2013-10-01	618
2014-01-01	339
2014-04-01	0
2014-07-01	0
2014-10-01	202
2015-01-01	206
2015-04-01	430
2015-07-01	411
2015-10-01	502
2016-01-01	521
2016-04-01	562
2016-07-01	564
2016-10-01	245
2017-01-01	250
2017-04-01	0
2017-07-01	0
2017-10-01	102
2018-01-01	105
2018-04-01	101