Quarter	Millions of US Dollars
1972-07-01	0
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	0
1979-10-01	0
1980-01-01	0
1980-04-01	50
1980-07-01	50
1980-10-01	50
1981-01-01	50
1981-04-01	85
1981-07-01	85
1981-10-01	85
1982-01-01	85
1982-04-01	28
1982-07-01	27
1982-10-01	104
1983-01-01	102
1983-04-01	134
1983-07-01	132
1983-10-01	153
1984-01-01	160
1984-04-01	97
1984-07-01	91
1984-10-01	210
1985-01-01	211
1985-04-01	212
1985-07-01	240
1985-10-01	87
1986-01-01	161
1986-04-01	173
1986-07-01	260
1986-10-01	312
1987-01-01	254
1987-04-01	443
1987-07-01	525
1987-10-01	484
1988-01-01	686
1988-04-01	433
1988-07-01	248
1988-10-01	408
1989-01-01	181
1989-04-01	167
1989-07-01	172
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	0
1992-01-01	0
1992-04-01	0
1992-07-01	0
1992-10-01	0
1993-01-01	0
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	0
1995-01-01	0
1995-04-01	0
1995-07-01	6
1995-10-01	0
1996-01-01	0
1996-04-01	737
1996-07-01	717
1996-10-01	688
1997-01-01	647
1997-04-01	0
1997-07-01	566
1997-10-01	9222
1998-01-01	9205
1998-04-01	9449
1998-07-01	9028
1998-10-01	360
1999-01-01	351
1999-04-01	4702
1999-07-01	4577
1999-10-01	4577
2000-01-01	4868
2000-04-01	7767
2000-07-01	10851
2000-10-01	12558
2001-01-01	12314
2001-04-01	5595
2001-07-01	3590
2001-10-01	2215
2002-01-01	2624
2002-04-01	2921
2002-07-01	3920
2002-10-01	4048
2003-01-01	3495
2003-04-01	5501
2003-07-01	3967
2003-10-01	3723
2004-01-01	4014
2004-04-01	2026
2004-07-01	8479
2004-10-01	10270
2005-01-01	12892
2005-04-01	23079
2005-07-01	16046
2005-10-01	15075
2006-01-01	13330
2006-04-01	2809
2006-07-01	4541
2006-10-01	4507
2007-01-01	3874
2007-04-01	4753
2007-07-01	3043
2007-10-01	2182
2008-01-01	1627
2008-04-01	1038
2008-07-01	1009
2008-10-01	2216
2009-01-01	3187
2009-04-01	2833
2009-07-01	3047
2009-10-01	3305
2010-01-01	3572
2010-04-01	2938
2010-07-01	4115
2010-10-01	2586
2011-01-01	2457
2011-04-01	2457
2011-07-01	2557
2011-10-01	2500
2012-01-01	1336
2012-04-01	2505
2012-07-01	1246
2012-10-01	1246
2013-01-01	1246
2013-04-01	0
2013-07-01	1694
2013-10-01	4072
2014-01-01	7275
2014-04-01	7264
2014-07-01	11014
2014-10-01	8601
2015-01-01	6576
2015-04-01	6626
2015-07-01	850
2015-10-01	858
2016-01-01	2550
2016-04-01	2980
2016-07-01	2982
2016-10-01	5258
2017-01-01	7223
2017-04-01	6809
2017-07-01	6809
2017-10-01	4509
2018-01-01	0
2018-04-01	0