Quarter	Millions of US Dollars
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	0
1997-01-01	0
1997-04-01	0
1997-07-01	0
1997-10-01	0
1998-01-01	200
1998-04-01	200
1998-07-01	250
1998-10-01	285
1999-01-01	283
1999-04-01	279
1999-07-01	10
1999-10-01	73
2000-01-01	63
2000-04-01	204
2000-07-01	360
2000-10-01	394
2001-01-01	379
2001-04-01	256
2001-07-01	180
2001-10-01	222
2002-01-01	223
2002-04-01	1057
2002-07-01	1146
2002-10-01	929
2003-01-01	949
2003-04-01	662
2003-07-01	583
2003-10-01	1200
2004-01-01	856
2004-04-01	1155
2004-07-01	1179
2004-10-01	1022
2005-01-01	972
2005-04-01	0
2005-07-01	145
2005-10-01	342
2006-01-01	345
2006-04-01	607
2006-07-01	453
2006-10-01	263
2007-01-01	266
2007-04-01	0
2007-07-01	0
2007-10-01	0
2008-01-01	0
2008-04-01	0
2008-07-01	0
2008-10-01	0
2009-01-01	0
2009-04-01	707
2009-07-01	732
2009-10-01	720
2010-01-01	674
2010-04-01	0
2010-07-01	0
2010-10-01	0
2011-01-01	0
2011-04-01	0
2011-07-01	0
2011-10-01	0
2012-01-01	0
2012-04-01	0
2012-07-01	0
2012-10-01	0
2013-01-01	0
2013-04-01	1598
2013-07-01	1650
2013-10-01	1685
2014-01-01	4442
2014-04-01	2732
2014-07-01	2517
2014-10-01	1728
2015-01-01	1345
2015-04-01	1609
2015-07-01	1615
2015-10-01	1575
2016-01-01	230
2016-04-01	1110
2016-07-01	1116
2016-10-01	1054
2017-01-01	1069
2017-04-01	377
2017-07-01	372
2017-10-01	1947
2018-01-01	2000
2018-04-01	1533