Quarter	Millions of US Dollars
1972-07-01	25
1973-01-01	25
1973-04-01	190
1973-07-01	95
1973-10-01	91
1974-01-01	54
1976-10-01	7
1978-01-01	200
1978-04-01	150
1979-01-01	-25
1979-04-01	-40
1979-07-01	-40
1980-01-01	-34
1980-04-01	-100
1980-10-01	-116
1981-01-01	-20
1981-04-01	-50
1981-07-01	-30
1981-10-01	-25
1983-07-01	-25
1985-01-01	-200
1985-10-01	2450
1987-01-01	-33
1987-07-01	-25
1988-01-01	-33
1988-10-01	-2500
1989-01-01	-21
1990-04-01	-12
1991-01-01	3819
1992-10-01	6600
1996-07-01	2000
1996-10-01	1993
1997-10-01	-3132
1998-01-01	543
1998-04-01	552
1998-07-01	551
2000-01-01	118
2001-01-01	-3921
2001-07-01	-1736
2001-10-01	-2000
2002-10-01	-3000
2003-07-01	3000
2008-07-01	-3000
2010-04-01	11705
2010-10-01	7928
2012-10-01	304
2014-04-01	422
2014-07-01	336
2014-10-01	1035
2016-10-01	453
2017-10-01	-453
2018-01-01	202