Quarter	Millions of US Dollars
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	0
1985-04-01	0
1985-07-01	0
1985-10-01	25
1986-01-01	25
1986-04-01	25
1986-07-01	25
1994-01-01	0
1994-04-01	0
1994-07-01	0
1994-10-01	25
1995-01-01	25
1995-04-01	0
1995-07-01	0
1995-10-01	0
1996-01-01	40
1996-04-01	90
1996-07-01	80
1996-10-01	80
1997-01-01	40
1997-04-01	0
1997-07-01	0
1997-10-01	740
1998-01-01	740
1998-04-01	740
1998-07-01	745
1998-10-01	5
1999-01-01	5
1999-04-01	5
1999-07-01	0
1999-10-01	3
2000-01-01	3
2000-04-01	3
2000-07-01	3
2000-10-01	0
2001-01-01	690
2001-04-01	759
2001-07-01	759
2001-10-01	759
2002-01-01	1004
2002-04-01	936
2002-07-01	973
2002-10-01	965
2003-01-01	947
2003-04-01	1047
2003-07-01	1010
2003-10-01	100
2004-01-01	167
2004-04-01	67
2004-07-01	67
2004-10-01	67
2005-01-01	100
2005-04-01	100
2005-07-01	100
2005-10-01	100
2006-01-01	703
2006-04-01	805
2006-07-01	1787
2006-10-01	1787
2007-01-01	2526
2007-04-01	2424
2007-07-01	1442
2007-10-01	1592
2008-01-01	150
2008-04-01	150
2008-07-01	150
2008-10-01	0
2009-01-01	102
2009-04-01	845
2009-07-01	865
2009-10-01	857
2010-01-01	717
2010-04-01	10
2010-07-01	235
2010-10-01	235
2011-01-01	248
2011-04-01	238
2011-07-01	43
2011-10-01	57
2012-01-01	51
2012-04-01	76
2012-07-01	61
2012-10-01	72
2013-01-01	65
2013-04-01	65
2013-07-01	50
2013-10-01	703
2014-01-01	1476
2014-04-01	1698
2014-07-01	1694
2014-10-01	1051
2015-01-01	1328
2015-04-01	2538
2015-07-01	3047
2015-10-01	3034
2016-01-01	3039
2016-04-01	1590
2016-07-01	1250
2016-10-01	1250
2017-01-01	1178
2017-04-01	2763
2017-07-01	2560
2017-10-01	2558
2018-01-01	2586
2018-04-01	1300