Quarter	US Dollars, sum over component sub-periods
2005-01-01	12635410142.194200
2005-04-01	14041990913.193000
2005-07-01	13679168224.367601
2005-10-01	14445635413.494900
2006-01-01	14446761445.648802
2006-04-01	15915979894.425499
2006-07-01	15456789215.686300
2006-10-01	17788664857.563500
2007-01-01	17830449427.396603
2007-04-01	18990204501.742302
2007-07-01	19058332200.456900
2007-10-01	22601032699.835197
2008-01-01	21477198208.142800
2008-04-01	24138668357.533100
2008-07-01	22411831045.359700
2008-10-01	18775282516.030598
2009-01-01	15578046596.443800
2009-04-01	16219421559.048500
2009-07-01	17238247581.278500
2009-10-01	19718803710.434400
2010-01-01	17965045062.069600
2010-04-01	18854962841.384800
2010-07-01	18427916160.912400
2010-10-01	20608514313.324300
2011-01-01	23844652219.729400
2011-04-01	22411637355.596700
2011-07-01	22042591218.016003
2011-10-01	22747114291.225200
2012-01-01	21427692684.585503
2012-04-01	21719916606.754400
2012-07-01	21394833602.030300
2012-10-01	23293908155.964100
2013-01-01	21951304189.782497
2013-04-01	23206716781.867397
2013-07-01	23058468831.090200
2013-10-01	23359461232.063698
2014-01-01	22250093298.938900
2014-04-01	23179448953.311100
2014-07-01	24362302630.817400
2014-10-01	21423796932.494700
2015-01-01	19618362617.199600
2015-04-01	19712675492.236900
2015-07-01	18220133568.587400
2015-10-01	18793648947.767498
2016-01-01	20003645114.581800
2016-04-01	22878474740.266100
2016-07-01	22888330713.866398
2016-10-01	22620606199.528800
2017-01-01	22148001422.798702
2017-04-01	23249330459.439598
2017-07-01	24628479898.012100
2017-10-01	25032190330.636200
2018-01-01	24314812103.335500
2018-04-01	26969418445.118500