Quarter	US Dollars, monthly level
1991-01-01	1578200000.0000000
1991-04-01	1870400000.0000000
1991-07-01	1812900000.0000000
1991-10-01	1858400000.0000000
1992-01-01	1657100000.0000000
1992-04-01	1729100000.0000000
1992-07-01	1781000000.0000000
1992-10-01	1742500000.0000000
1993-01-01	1764800000.0000000
1993-04-01	1806600000.0000000
1993-07-01	1708100000.0000000
1993-10-01	1843900000.0000000
1994-01-01	1720700000.0000000
1994-04-01	2040299999.9999998
1994-07-01	2324800000.0000000
1994-10-01	2451700000.0000000
1995-01-01	2363700000.0000000
1995-04-01	2579500000.0000000
1995-07-01	2603800000.0000000
1995-10-01	2654100000.0000000
1996-01-01	2439300000.0000000
1996-04-01	2757900000.0000000
1996-07-01	2544100000.0000000
1996-10-01	2906300000.0000000
1997-01-01	2428800000.0000000
1997-04-01	3111400000.0000000
1997-07-01	2961800000.0000000
1997-10-01	3047000000.0000000
1998-01-01	2600400000.0000000
1998-04-01	2899400000.0000000
1998-07-01	2676600000.0000000
1998-10-01	2689200000.0000000
1999-01-01	2433800000.0000000
1999-04-01	2810100000.0000000
1999-07-01	3081100000.0000000
1999-10-01	3292000000.0000000
2000-01-01	3119300000.0000000
2000-04-01	3186700000.0000000
2000-07-01	3449700000.0000000
2000-10-01	3402800000.0000000
2001-01-01	2984100000.0000000
2001-04-01	3123200000.0000000
2001-07-01	3274300000.0000000
2001-10-01	2948400000.0000000
2002-01-01	2748900000.0000000
2002-04-01	3121900000.0000000
2002-07-01	3011800000.0000000
2002-10-01	3092800000.0000000
2003-01-01	2990600000.0000000
2003-04-01	3278300000.0000000
2003-07-01	3440000000.0000000
2003-10-01	3419600000.0000000
2004-01-01	3421900000.0000000
2004-04-01	4040899999.9999995
2004-07-01	4577100000.0000000
2004-10-01	4748400000.0000000
2005-01-01	4630400000.0000000
2005-04-01	5517600000.0000000
2005-07-01	5444500000.0000000
2005-10-01	5553700000.0000000
2006-01-01	5460100000.0000000
2006-04-01	6123300000.0000000
2006-07-01	6376100000.0000000
2006-10-01	6552600000.0000000
2007-01-01	6143200000.0000000
2007-04-01	7340100000.0000000
2007-07-01	7792300000.0000000
2007-10-01	9003800000.0000000
2008-01-01	8672100000.0000000
2008-04-01	10433700000.0000000
2008-07-01	10229900000.0000000
2008-10-01	7450800000.0000000
2009-01-01	7577100000.0000000
2009-04-01	7908200000.0000000
2009-07-01	8368100000.0000000
2009-10-01	8993000000.0000000
2010-01-01	9120500000.0000000
2010-04-01	10064900000.0000000
2010-07-01	9720500000.0000000
2010-10-01	10807400000.0000000
2011-01-01	12612100000.0000000
2011-04-01	14685500000.0000000
2011-07-01	14390300000.0000000
2011-10-01	15227000000.0000000
2012-01-01	15497500000.0000000
2012-04-01	14977700000.0000000
2012-07-01	14458100000.0000000
2012-10-01	15191800000.0000000
2013-01-01	14134800000.0000000
2013-04-01	15152800000.0000000
2013-07-01	14480000000.0000000
2013-10-01	15058800000.0000000
2014-01-01	13488400000.0000000
2014-04-01	14517400000.0000000
2014-07-01	14939200000.0000000
2014-10-01	11911700000.0000000
2015-01-01	9539900000.0000000
2015-04-01	9818200000.0000000
2015-07-01	8810500000.0000000
2015-10-01	7849000000.0000000
2016-01-01	6582800000.0000000
2016-04-01	7995800000.0000000
2016-07-01	8109100000.0000000
2016-10-01	9080700000.0000000
2017-01-01	8798000000.0000000
2017-04-01	9063500000.0000000
2017-07-01	9665900000.0000000
2017-10-01	10353200000.0000000
2018-01-01	9693500000.0000000
2018-04-01	10800700000.0000000