Quarter	US Dollars, sum over component sub-periods
1996-01-01	421116531.62070900
1996-04-01	580684293.25453200
1996-07-01	720627939.50512600
1996-10-01	769274938.25331100
1997-01-01	783781410.45805300
1997-04-01	948764865.65381000
1997-07-01	298077344.39398503
1997-10-01	941883793.33589100
1998-01-01	644909333.16420790
1998-04-01	255522722.88643400
1998-07-01	492663463.40319200
1998-10-01	1293889526.29601000
1999-01-01	437776750.12916200
1999-04-01	641447376.28615500
1999-07-01	615568022.52345600
1999-10-01	1019202588.62143990
2000-01-01	266561382.17499700
2000-04-01	182106916.75381500
2000-07-01	509677464.03472700
2000-10-01	632117482.03818800
2001-01-01	226971796.18306500
2001-04-01	220199640.29111502
2001-07-01	647182291.71323690
2001-10-01	768481671.62063800
2002-01-01	398866348.06161500
2002-04-01	597749457.77190300
2002-07-01	417083830.72661300
2002-10-01	1163543106.89508000
2003-01-01	921083235.67945200
2003-04-01	664496552.57387100
2003-07-01	760944146.97444900
2003-10-01	1293423762.42678000
2004-01-01	1013871513.93844000
2004-04-01	354342387.23163500
2004-07-01	579549024.52654700
2004-10-01	1342036784.39325000
2005-01-01	538598594.64975800
2005-04-01	610377812.68323990
2005-07-01	551214404.43770210
2005-10-01	1081127686.60744000
2006-01-01	719332793.41116000
2006-04-01	333074537.02479100
2006-07-01	787668768.27805010
2006-10-01	638502481.43288900
2007-01-01	916469600.06668810
2007-04-01	405771688.34955300
2007-07-01	734183528.16229100
2007-10-01	678165280.64115000
2008-01-01	1111669924.97625020
2008-04-01	329594257.42513597
2008-07-01	433358259.30451600
2008-10-01	1200421420.89649990
2009-01-01	621906288.25557500
2009-04-01	721766125.09807100
2009-07-01	729516105.93050990
2009-10-01	776734905.56010200
2010-01-01	362547319.93713700
2010-04-01	646779414.87913400
2010-07-01	740513021.34325400
2010-10-01	1566347752.99987000
2011-01-01	725996735.92605800
2011-04-01	725405775.88086900
2011-07-01	900833146.56558500
2011-10-01	1292087220.50971000
2012-01-01	1112076428.95058010
2012-04-01	857894215.16274110
2012-07-01	1052383582.81017000
2012-10-01	1484687297.85431000
2013-01-01	725722083.00040500
2013-04-01	863272516.27992200
2013-07-01	823905146.35161100
2013-10-01	1302585805.99308000
2014-01-01	753770827.59027800
2014-04-01	793958234.41760000
2014-07-01	932464121.72417800
2014-10-01	604343170.93845510
2015-01-01	533595812.53164196
2015-04-01	663628642.41330600
2015-07-01	464689523.94295300
2015-10-01	657658378.39306090
2016-01-01	337252995.34761000
2016-04-01	376029399.60723900
2016-07-01	729780378.73135100
2016-10-01	629265373.81732810
2017-01-01	430485068.04091700
2017-04-01	367325501.33094996
2017-07-01	579023865.38149200
2017-10-01	693557843.05663600
2018-01-01	405529613.80692900
2018-04-01	480056578.15836800