Quarter	US Dollars, sum over component sub-periods
2006-01-01	953257187022.247000
2006-04-01	691665137187.302000
2006-07-01	721603479989.614000
2006-10-01	1072010232948.070000
2007-01-01	1157432574540.730000
2007-04-01	1226739447543.510000
2007-07-01	325325274651.721000
2007-10-01	632039953866.150000
2008-01-01	527850143624.286100
2008-04-01	909065194030.028000
2008-07-01	-23628028968.305103
2008-10-01	-310349641568.294000
2009-01-01	445817278164.428040
2009-04-01	622262680955.001000
2009-07-01	602566445617.793000
2009-10-01	463529470228.990000
2010-01-01	676009674299.371000
2010-04-01	297945566648.334000
2010-07-01	735980382835.741100
2010-10-01	353765708637.608000
2011-01-01	683208587551.281000
2011-04-01	601223686334.096900
2011-07-01	-43038435989.215600
2011-10-01	-170347641492.368000
2012-01-01	456469399893.492000
2012-04-01	148124920639.423000
2012-07-01	292157062855.983000
2012-10-01	794984516270.240000
2013-01-01	557602160509.752000
2013-04-01	332515787084.954000
2013-07-01	411197175220.907040
2013-10-01	631442034431.554900
2014-01-01	691631806790.553000
2014-04-01	874379434452.268000
2014-07-01	505084302742.334050
2014-10-01	413077470362.729000
2015-01-01	943924838819.394000
2015-04-01	524765585657.345950
2015-07-01	-142871776985.550020
2015-10-01	189848356684.695000
2016-01-01	-29143954897.441700
2016-04-01	187696006538.173000
2016-07-01	377627703939.761000
2016-10-01	61337291949.912600
2017-01-01	607724072446.653900
2017-04-01	639372568438.582000
2017-07-01	577061488032.232000
2017-10-01	420385447239.396000
2018-01-01	662761727543.481900
2018-04-01	171469702747.820980