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	54
1988-04-01	93
1988-07-01	88
1988-10-01	110
1989-01-01	57
1989-04-01	19
1989-07-01	19
1989-10-01	36
1990-01-01	37
1990-04-01	37
1990-07-01	40
1990-10-01	29
1991-01-01	25
1991-04-01	24
1991-07-01	25
1991-10-01	1
1992-01-01	1
1992-04-01	8
1992-07-01	9
1992-10-01	8
1993-01-01	8
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	34
1995-01-01	39
1995-04-01	39
1995-07-01	166
1995-10-01	126
1996-01-01	122
1996-04-01	116
1996-07-01	0
1996-10-01	74
1997-01-01	69
1997-04-01	69
1997-07-01	69
2008-04-01	0
2008-07-01	0
2008-10-01	0
2009-01-01	0
2009-04-01	0
2009-07-01	0
2009-10-01	0
2010-01-01	0
2010-04-01	0
2010-07-01	0
2010-10-01	0
2011-01-01	0
2011-04-01	359
2011-07-01	333
2011-10-01	319
2012-01-01	333
2012-04-01	0
2012-07-01	0
2012-10-01	0
2013-01-01	0
2013-04-01	318
2013-07-01	331
2013-10-01	337
2014-01-01	339
2014-04-01	0
2014-07-01	0
2014-10-01	0
2015-01-01	0
2015-04-01	0
2015-07-01	0
2015-10-01	0
2016-01-01	0
2016-04-01	0
2016-07-01	0
2016-10-01	0
2017-01-01	0
2017-04-01	0
2017-07-01	0
2017-10-01	102
2018-01-01	105
2018-04-01	101