Quarter	Millions of US Dollars
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	25
1981-10-01	25
1982-01-01	25
1982-04-01	25
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	1
1985-01-01	1
1985-04-01	1
1985-07-01	26
1985-10-01	48
1986-01-01	49
1986-04-01	51
1986-07-01	29
1993-04-01	111
1993-07-01	111
1993-10-01	111
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	0
1995-10-01	0
1996-01-01	0
1996-04-01	0
1996-07-01	0
1996-10-01	100
1997-01-01	100
1997-04-01	250
1997-07-01	250
1997-10-01	150
1998-01-01	150
1998-04-01	0
1998-07-01	0
1998-10-01	0
1999-01-01	0
1999-04-01	0
1999-07-01	0
1999-10-01	0
2000-01-01	0
2000-04-01	180
2000-07-01	180
2000-10-01	180
2001-01-01	180
2001-04-01	465
2001-07-01	9
2001-10-01	19
2002-01-01	91
2002-04-01	267
2002-07-01	298
2002-10-01	588
2003-01-01	523
2003-04-01	347
2003-07-01	1439
2003-10-01	568
2004-01-01	336
2004-04-01	584
2004-07-01	527
2004-10-01	527
2005-01-01	1102
2005-04-01	1002
2005-07-01	1207
2005-10-01	1507
2006-01-01	866
2006-04-01	716
2006-07-01	326
2006-10-01	276
2007-01-01	268
2007-04-01	388
2007-07-01	789
2007-10-01	539
2008-01-01	540
2008-04-01	1160
2008-07-01	899
2008-10-01	899
2009-01-01	899
2009-04-01	159
2009-07-01	320
2009-10-01	320
2010-01-01	378
2010-04-01	576
2010-07-01	678
2010-10-01	698
2011-01-01	931
2011-04-01	731
2011-07-01	340
2011-10-01	1153
2012-01-01	1361
2012-04-01	1805
2012-07-01	1297
2012-10-01	955
2013-01-01	1855
2013-04-01	1405
2013-07-01	1400
2013-10-01	1517
2014-01-01	617
2014-04-01	1017
2014-07-01	1117
2014-10-01	793
2015-01-01	789
2015-04-01	587
2015-07-01	500
2015-10-01	550
2016-01-01	550
2016-04-01	353
2016-07-01	516
2016-10-01	1761
2017-01-01	1762
2017-04-01	2145
2017-07-01	2691
2017-10-01	1317
2018-01-01	1922
2018-04-01	1710