Quarter	Millions of US Dollars
1992-01-01	2051
1992-04-01	2051
1992-07-01	2051
1992-10-01	2051
1993-01-01	2051
1993-04-01	2051
1993-07-01	2051
1993-10-01	2051
1994-01-01	2051
1994-04-01	2051
1994-07-01	2051
1994-10-01	2051
1995-01-01	2051
1995-04-01	2051
1995-07-01	2051
1995-10-01	2051
1996-01-01	2051
1996-04-01	2051
1996-07-01	2051
1996-10-01	2051
1997-01-01	2051
1997-04-01	2051
1997-07-01	2051
1997-10-01	2051
1998-01-01	2051
1998-04-01	2051
1998-07-01	2051
1998-10-01	2051
1999-01-01	2051
1999-04-01	2051
1999-07-01	2051
1999-10-01	2051
2000-01-01	2051
2000-04-01	2051
2000-07-01	2051
2000-10-01	2051
2001-01-01	2051
2001-04-01	2051
2001-07-01	2051
2001-10-01	2051
2002-01-01	2051
2002-04-01	2051
2002-07-01	2051
2002-10-01	1450
2003-01-01	1450
2003-04-01	1450
2003-07-01	1450
2003-10-01	1450
2004-01-01	1450
2004-04-01	1450
2004-07-01	1450
2004-10-01	1450
2005-01-01	1450
2005-04-01	1450
2005-07-01	1450
2005-10-01	1450
2006-01-01	1450
2006-04-01	1450
2006-07-01	1450
2007-01-01	525
2007-04-01	525
2007-07-01	525
2007-10-01	525
2008-01-01	525
2008-04-01	525
2008-07-01	525
2008-10-01	525
2009-01-01	525
2009-04-01	525
2009-07-01	525
2009-10-01	525
2010-01-01	613
2010-04-01	613
2010-07-01	612
2010-10-01	613
2011-01-01	1111
2011-04-01	2111
2011-07-01	2110
2011-10-01	2108
2012-01-01	1584
2012-04-01	1584
2012-07-01	1686
2012-10-01	1686
2013-01-01	2159
2013-04-01	2459
2013-07-01	3759
2013-10-01	4715
2014-01-01	4715
2014-04-01	6134
2014-07-01	6831
2014-10-01	7084
2015-01-01	6934
2015-04-01	8240
2015-07-01	8289
2015-10-01	8333
2016-01-01	8579
2016-04-01	7590
2016-07-01	7537
2016-10-01	8927
2017-01-01	8918
2017-04-01	11357
2017-07-01	11425
2017-10-01	15394
2018-01-01	17306
2018-04-01	18185