Quarter	Millions of US Dollars
1972-10-01	0
1973-01-01	0
1973-04-01	0
1973-07-01	0
1973-10-01	0
1974-01-01	0
1974-04-01	0
1974-07-01	0
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	52
1979-10-01	50
1980-01-01	43
1980-04-01	49
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	35
1982-04-01	49
1982-07-01	47
1982-10-01	50
1983-01-01	16
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	10
1985-04-01	10
1985-07-01	11
1985-10-01	12
1986-01-01	0
1986-04-01	0
1986-07-01	0
1986-10-01	0
1987-01-01	0
1987-04-01	36
1987-07-01	36
1987-10-01	42
1988-01-01	69
1988-04-01	26
1988-07-01	25
1988-10-01	27
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	107
1992-01-01	101
1992-04-01	116
1992-07-01	123
1992-10-01	45
1993-01-01	45
1993-04-01	35
1993-07-01	34
1993-10-01	0
1994-01-01	78
1994-04-01	82
1994-07-01	86
1994-10-01	84
1995-01-01	0
1995-04-01	96
1995-07-01	52
1995-10-01	20
1996-01-01	20
1996-04-01	19
1996-10-01	0
1997-01-01	0
1997-04-01	0
1997-07-01	0
1997-10-01	0
1998-01-01	54
1998-04-01	121
1998-07-01	158
1998-10-01	536
1999-01-01	411
1999-04-01	613
1999-07-01	952
1999-10-01	713
2000-01-01	1659
2000-04-01	920
2000-07-01	901
2000-10-01	861
2001-01-01	2211
2001-04-01	2211
2001-07-01	3010
2001-10-01	3197
2002-01-01	3339
2002-04-01	3679
2002-07-01	3427
2002-10-01	2512
2003-01-01	3290
2003-04-01	4470
2003-07-01	4860
2003-10-01	5053
2004-01-01	5601
2004-04-01	5171
2004-07-01	4695
2004-10-01	4312
2005-01-01	4565
2005-04-01	5256
2005-07-01	4749
2005-10-01	4975
2006-01-01	5838
2006-04-01	4370
2006-07-01	4143
2006-10-01	4991
2007-01-01	6911
2007-04-01	5410
2007-07-01	2327
2007-10-01	2157
2008-01-01	5276
2008-04-01	5584
2008-07-01	5735
2008-10-01	7430
2009-01-01	5801
2009-04-01	6274
2009-07-01	6287
2009-10-01	5528
2010-01-01	4018
2010-04-01	2681
2010-07-01	659
2010-10-01	1379
2011-01-01	1481
2011-04-01	4442
2011-07-01	3908
2011-10-01	2856
2012-01-01	3383
2012-04-01	1009
2012-07-01	1450
2012-10-01	1440
2013-01-01	1397
2013-04-01	1879
2013-07-01	2754
2013-10-01	2982
2014-01-01	2982
2014-04-01	1787
2014-07-01	368
2014-10-01	707
2015-01-01	471
2015-04-01	1582
2015-07-01	1327
2015-10-01	1210
2016-01-01	2337
2016-04-01	1681
2016-07-01	1672
2016-10-01	2692
2017-01-01	1018
2017-04-01	1240
2017-07-01	1507
2017-10-01	673
2018-01-01	647
2018-04-01	325