Quarter	US Dollars, sum over component sub-periods
1999-01-01	171766867670.08902
1999-04-01	181702474443.99600
1999-07-01	201154472661.23798
1999-10-01	188306755380.31000
2000-01-01	176364262618.06200
2000-04-01	190470609065.16400
2000-07-01	208668070918.08700
2000-10-01	185863099134.38300
2001-01-01	182722107655.52900
2001-04-01	192412918471.74600
2001-07-01	207154299077.75000
2001-10-01	179622296015.49700
2002-01-01	176248228095.20800
2002-04-01	197490873736.64100
2002-07-01	221688495501.23700
2002-10-01	207400845271.18802
2003-01-01	206166203467.04202
2003-04-01	218345195933.78702
2003-07-01	247275361191.84500
2003-10-01	232609827105.79100
2004-01-01	240215602471.46600
2004-04-01	256671706143.90000
2004-07-01	281368010915.56100
2004-10-01	269923575611.48100
2005-01-01	265207634661.35696
2005-04-01	279221420402.65500
2005-07-01	301796517004.42000
2005-10-01	275258200960.23300
2006-01-01	277658250662.99200
2006-04-01	303196271501.45703
2006-07-01	329623898660.64700
2006-10-01	313579304941.36300
2007-01-01	307837754239.95105
2007-04-01	340052670653.25700
2007-07-01	378791660774.19200
2007-10-01	358912155225.89600
2008-01-01	361402330852.77200
2008-04-01	394827681248.15000
2008-07-01	409175071161.32996
2008-10-01	344480559360.57100
2009-01-01	308889726338.30800
2009-04-01	330053800143.17000
2009-07-01	363909817604.14800
2009-10-01	343369191407.97400
2010-01-01	329291257319.01000
2010-04-01	346836804654.33300
2010-07-01	376019625967.85803
2010-10-01	362926097459.73000
2011-01-01	352115159380.88000
2011-04-01	390081041002.05597
2011-07-01	414401781128.59300
2011-10-01	375193987675.69800
2012-01-01	363847944766.89703
2012-04-01	390563969254.18396
2012-07-01	411121232519.20400
2012-10-01	385641426879.37900
2013-01-01	377732693216.33400
2013-04-01	403150010810.43500
2013-07-01	428436685132.05500
2013-10-01	411280871975.47000
2014-01-01	402714141517.01800
2014-04-01	435194384511.58400
2014-07-01	451908395284.84000
2014-10-01	417032019116.67800
2015-01-01	379680901540.43896
2015-04-01	404367194625.92900
2015-07-01	425221289311.06300
2015-10-01	410091546706.00100
2016-01-01	384871703900.11300
2016-04-01	419713744688.81494
2016-07-01	436980748443.73600
2016-10-01	417211019525.96100
2017-01-01	395434788474.32605
2017-04-01	431313457030.20600
2017-07-01	466190649480.96600
2017-10-01	451093808673.05005
2018-01-01	439636776823.74000