Quarter	US Dollars, sum over component sub-periods
2006-01-01	348394959940.80400
2006-04-01	374869850098.46800
2006-07-01	404021211196.97200
2006-10-01	410715442859.38600
2007-01-01	400494923445.81400
2007-04-01	437069811550.47700
2007-07-01	476369070343.69904
2007-10-01	487971164477.31000
2008-01-01	492915457842.14500
2008-04-01	524337273509.11300
2008-07-01	540676655304.03204
2008-10-01	480336453594.34200
2009-01-01	425243439943.95600
2009-04-01	447443807139.41500
2009-07-01	482121100872.49800
2009-10-01	492200635161.51605
2010-01-01	475247534046.35095
2010-04-01	498822988366.25700
2010-07-01	527771472669.18200
2010-10-01	547831634209.36600
2011-01-01	533005948323.21900
2011-04-01	564990853608.87500
2011-07-01	600065276119.28500
2011-10-01	578189400171.60200
2012-01-01	555993425896.36500
2012-04-01	590552636910.55990
2012-07-01	608690410226.09110
2012-10-01	604022224487.02100
2013-01-01	584367069155.91990
2013-04-01	613201996293.11300
2013-07-01	644297167861.41990
2013-10-01	641907311674.23200
2014-01-01	644205414450.81400
2014-04-01	672830326618.28390
2014-07-01	706867197805.20200
2014-10-01	681645324207.53310
2015-01-01	616353291115.94100
2015-04-01	650306219350.91410
2015-07-01	667646577622.33900
2015-10-01	650037789679.97200
2016-01-01	606266758362.78600
2016-04-01	651558302954.91300
2016-07-01	671109240083.96000
2016-10-01	682291442729.40890
2017-01-01	639890565173.26600
2017-04-01	693447154390.11290
2017-07-01	709860659034.94200
2017-10-01	723078710633.67900