Quarter	US Dollars, monthly level
1991-01-01	384400000.00000000
1991-04-01	651000000.00000000
1991-07-01	388200000.00000000
1991-10-01	729300000.00000000
1992-01-01	381800000.00000000
1992-04-01	191100000.00000000
1992-07-01	-48500000.00000000
1992-10-01	-300600000.00000000
1993-01-01	-575500000.00000000
1993-04-01	-702600000.00000000
1993-07-01	-697400000.00000000
1993-10-01	-730400000.00000000
1994-01-01	-743200000.00000000
1994-04-01	-896400000.00000000
1994-07-01	-982300000.00000000
1994-10-01	-781400000.00000000
1995-01-01	-778100000.00000000
1995-04-01	-986800000.00000000
1995-07-01	-954000000.00000000
1995-10-01	-963400000.00000000
1996-01-01	-839100000.00000000
1996-04-01	-639500000.00000000
1996-07-01	-929100000.00000000
1996-10-01	-625300000.00000000
1997-01-01	-711500000.00000000
1997-04-01	-777900000.00000000
1997-07-01	-1093700000.00000000
1997-10-01	-1202100000.00000000
1998-01-01	-1380100000.00000000
1998-04-01	-1067800000.00000010
1998-07-01	-1012000000.00000000
1998-10-01	-351900000.00000000
1999-01-01	-77800000.00000000
1999-04-01	252199999.99999997
1999-07-01	491800000.00000000
1999-10-01	291400000.00000000
2000-01-01	307100000.00000000
2000-04-01	164400000.00000000
2000-07-01	568100000.00000000
2000-10-01	361900000.00000000
2001-01-01	-184200000.00000000
2001-04-01	-230200000.00000000
2001-07-01	79500000.00000000
2001-10-01	-155800000.00000000
2002-01-01	23300000.00000000
2002-04-01	-202400000.00000000
2002-07-01	-255000000.00000000
2002-10-01	-285900000.00000000
2003-01-01	-329800000.00000000
2003-04-01	-51400000.00000000
2003-07-01	-159700000.00000000
2003-10-01	-212300000.00000000
2004-01-01	-165300000.00000000
2004-04-01	-26300000.00000000
2004-07-01	319900000.00000000
2004-10-01	-104300000.00000000
2005-01-01	70600000.00000000
2005-04-01	111200000.00000000
2005-07-01	-135600000.00000000
2005-10-01	-104200000.00000000
2006-01-01	-193100000.00000000
2006-04-01	-252199999.99999997
2006-07-01	-473300000.00000000
2006-10-01	-731800000.00000000
2007-01-01	-1246600000.00000000
2007-04-01	-563300000.00000000
2007-07-01	-653000000.00000000
2007-10-01	-154800000.00000000
2008-01-01	-209900000.00000000
2008-04-01	384000000.00000000
2008-07-01	-418400000.00000000
2008-10-01	-2635100000.00000000
2009-01-01	-395700000.00000000
2009-04-01	307000000.00000000
2009-07-01	-100800000.00000000
2009-10-01	144900000.00000000
2010-01-01	352400000.00000000
2010-04-01	637200000.00000000
2010-07-01	-1172500000.00000000
2010-10-01	-589500000.00000000
2011-01-01	514000000.00000000
2011-04-01	1166100000.00000000
2011-07-01	114900000.00000000
2011-10-01	887400000.00000000
2012-01-01	1453900000.00000000
2012-04-01	-40500000.00000000
2012-07-01	-654100000.00000000
2012-10-01	318200000.00000000
2013-01-01	-35900000.00000000
2013-04-01	493300000.00000000
2013-07-01	-754400000.00000000
2013-10-01	-257699999.99999997
2014-01-01	-1271100000.00000000
2014-04-01	-1284300000.00000000
2014-07-01	-1838200000.00000000
2014-10-01	-4778500000.00000000
2015-01-01	-4573400000.00000000
2015-04-01	-3303800000.00000000
2015-07-01	-5094000000.00000000
2015-10-01	-5068800000.00000000
2016-01-01	-3992900000.00000000
2016-04-01	-2976000000.00000000
2016-07-01	-3414400000.00000000
2016-10-01	-2737800000.00000000
2017-01-01	-2502200000.00000000
2017-04-01	-2476100000.00000000
2017-07-01	-2008000000.00000000
2017-10-01	-1208900000.00000000
2018-01-01	-1759100000.00000000
2018-04-01	-2179300000.00000000