Quarter	US Dollars, Monthly Level
1988-01-01	3120200000.0000000
1988-04-01	3146900000.0000000
1988-07-01	2805200000.0000000
1988-10-01	3214900000.0000000
1989-01-01	3273500000.0000000
1989-04-01	3278800000.0000000
1989-07-01	3037100000.0000000
1989-10-01	3440700000.0000000
1990-01-01	3568400000.0000000
1990-04-01	3574400000.0000000
1990-07-01	3665000000.0000000
1990-10-01	4299500000.0000000
1991-01-01	3818600000.0000000
1991-04-01	4235000000.0000005
1991-07-01	3869900000.0000000
1991-10-01	4750800000.0000000
1992-01-01	4497600000.0000000
1992-04-01	4516000000.0000000
1992-07-01	4710400000.0000000
1992-10-01	4813600000.0000000
1993-01-01	5254900000.0000000
1993-04-01	4909700000.0000000
1993-07-01	4758200000.0000000
1993-10-01	5286100000.0000000
1994-01-01	5618000000.0000000
1994-04-01	6159000000.0000000
1994-07-01	5192800000.0000000
1994-10-01	6399500000.0000000
1995-01-01	6950000000.0000000
1995-04-01	6722500000.0000000
1995-07-01	6780200000.0000000
1995-10-01	7529200000.0000000
1996-01-01	7683100000.0000000
1996-04-01	7176000000.0000000
1996-07-01	7209700000.0000000
1996-10-01	7514900000.0000000
1997-01-01	7423200000.0000000
1997-04-01	7074500000.0000000
1997-07-01	7015500000.0000000
1997-10-01	7170300000.0000000
1998-01-01	6937300000.0000000
1998-04-01	6731300000.0000000
1998-07-01	6575700000.0000000
1998-10-01	6766400000.0000000
1999-01-01	7207700000.0000000
1999-04-01	7392600000.0000000
1999-07-01	7724200000.0000000
1999-10-01	8305199999.9999990
2000-01-01	8574000000.0000000
2000-04-01	8526400000.0000010
2000-07-01	8925100000.0000000
2000-10-01	9195500000.0000000
2001-01-01	9012100000.0000000
2001-04-01	8294700000.0000010
2001-07-01	7806900000.0000000
2001-10-01	7582500000.0000000
2002-01-01	7629800000.0000000
2002-04-01	8291499999.9999990
2002-07-01	7830800000.0000000
2002-10-01	8804500000.0000000
2003-01-01	7965300000.0000000
2003-04-01	8179500000.0000010
2003-07-01	8566900000.0000000
2003-10-01	8995700000.0000000
2004-01-01	9664700000.0000000
2004-04-01	9755300000.0000000
2004-07-01	9966100000.0000000
2004-10-01	10970600000.0000000
2005-01-01	10892500000.0000000
2005-04-01	11101800000.0000000
2005-07-01	11784400000.0000000
2005-10-01	10678000000.0000000
2006-01-01	11331800000.0000000
2006-04-01	11763800000.0000000
2006-07-01	11522200000.0000000
2006-10-01	12700100000.0000000
2007-01-01	12333900000.0000000
2007-04-01	13313900000.0000000
2007-07-01	14579900000.0000000
2007-10-01	15878000000.0000000
2008-01-01	16278099999.9999980
2008-04-01	17156800000.0000000
2008-07-01	17429200000.0000000
2008-10-01	13667300000.0000000
2009-01-01	10493600000.0000000
2009-04-01	10589300000.0000000
2009-07-01	12476100000.0000000
2009-10-01	13368300000.0000000
2010-01-01	13852100000.0000000
2010-04-01	14260900000.0000000
2010-07-01	14282100000.0000000
2010-10-01	16309400000.0000000
2011-01-01	17655600000.0000000
2011-04-01	18734000000.0000000
2011-07-01	18529200000.0000000
2011-10-01	17828300000.0000000
2012-01-01	19120000000.0000000
2012-04-01	18372700000.0000000
2012-07-01	17345300000.0000000
2012-10-01	17432400000.0000000
2013-01-01	17130800000.0000000
2013-04-01	17857100000.0000000
2013-07-01	17723400000.0000000
2013-10-01	18390700000.0000000
2014-01-01	18205200000.0000000
2014-04-01	17754700000.0000000
2014-07-01	18248200000.0000000
2014-10-01	17271500000.0000000
2015-01-01	15567900000.0000000
2015-04-01	15284500000.0000000
2015-07-01	14828300000.0000000
2015-10-01	15656600000.0000000
2016-01-01	15815700000.0000000
2016-04-01	16177600000.0000020
2016-07-01	16923900000.0000000
2016-10-01	16147500000.0000000
2017-01-01	16223099999.9999980
2017-04-01	16180200000.0000000
2017-07-01	17295400000.0000000
2017-10-01	18307600000.0000000
2018-01-01	19756000000.0000000
2018-04-01	19712200000.0000000
2018-07-01	19513100000.0000000