Quarter	Billions of US Dollars
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	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	0
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	0
2000-07-01	0
2000-10-01	0
2001-01-01	0
2001-04-01	150
2001-07-01	150
2001-10-01	150
2002-01-01	150
2002-04-01	0
2002-07-01	0
2002-10-01	0
2003-01-01	0
2003-04-01	0
2003-07-01	0
2003-10-01	0
2004-01-01	0
2004-04-01	0
2004-07-01	0
2004-10-01	0
2005-01-01	0
2005-04-01	0
2005-07-01	0
2005-10-01	0
2006-01-01	0
2006-04-01	0
2006-07-01	0
2006-10-01	0
2007-01-01	100
2007-04-01	100
2007-07-01	100
2007-10-01	100
2008-01-01	0
2008-04-01	0
2008-07-01	0
2008-10-01	0
2009-01-01	0
2009-04-01	0
2009-07-01	0
2009-10-01	0
2010-01-01	0
2010-04-01	150
2010-07-01	150
2010-10-01	150
2011-01-01	150
2011-04-01	0
2011-07-01	0
2011-10-01	0
2012-01-01	0
2012-04-01	200
2012-07-01	440
2012-10-01	491
2013-01-01	511
2013-04-01	470
2013-07-01	688
2013-10-01	614
2014-01-01	594
2014-04-01	631
2014-07-01	227
2014-10-01	212
2015-01-01	204
2015-04-01	276
2015-07-01	290
2015-10-01	302
2016-01-01	302
2016-04-01	159
2016-07-01	182
2016-10-01	170
2017-01-01	794
2017-04-01	880
2017-07-01	777
2017-10-01	653
2018-01-01	153
2018-04-01	54