Quarter	US Dollars, sum over component sub-periods
2006-01-01	13319306670.000000
2006-04-01	16376758410.000000
2006-07-01	16448440370.000000
2006-10-01	17684648320.000000
2007-01-01	18559757580.000000
2007-04-01	20320733940.000000
2007-07-01	21275107030.000000
2007-10-01	22386788990.000000
2008-01-01	22544778670.000000
2008-04-01	24835040000.000000
2008-07-01	26763456000.000000
2008-10-01	27310336000.000000
2009-01-01	20974080000.000000
2009-04-01	22059736000.000000
2009-07-01	21722658670.000000
2009-10-01	22321098670.000000
2010-01-01	22282760000.000000
2010-04-01	24918616000.000000
2010-07-01	24339056000.000000
2010-10-01	25890704000.000000
2011-01-01	26494450670.000000
2011-04-01	30558938670.000000
2011-07-01	31229426670.000000
2011-10-01	31677874670.000000
2012-01-01	33178624000.000004
2012-04-01	36556445330.000000
2012-07-01	35973802670.000000
2012-10-01	36090282670.000000
2013-01-01	38130936000.000000
2013-04-01	40895546670.000000
2013-07-01	37920557330.000000
2013-10-01	36396592000.000000
2014-01-01	36987266670.000000
2014-04-01	41352565330.000000
2014-07-01	41047456660.000000
2014-10-01	39074693330.000000
2015-01-01	39851272000.000000
2015-04-01	41260179730.000000
2015-07-01	38260893330.000000
2015-10-01	39898789330.000000
2016-01-01	34804800000.000000
2016-04-01	33961775999.999996
2016-07-01	28542544000.000000
2016-10-01	30534282670.000000
2017-01-01	30698728020.000000
2017-04-01	30786314670.000000
2017-07-01	27997589330.000000
2017-10-01	29845496000.000000
2018-01-01	30178088000.000000
2018-04-01	32488565870.000000