Quarter	US Dollars, Sum Over Component Sub-periods
1997-01-01	1882808994.433270
1997-04-01	15205921040.833300
1997-07-01	17580695903.792600
1997-10-01	21477783101.895500
1998-01-01	-2499844919.039830
1998-04-01	10878503235.167200
1998-07-01	8254542855.654380
1998-10-01	5412361944.701480
1999-01-01	-10232732170.919700
1999-04-01	-3127025503.733970
1999-07-01	-7791526845.637580
1999-10-01	-14171250648.676700
2000-01-01	-21924178102.478000
2000-04-01	-28275121404.557300
2000-07-01	-22258939060.758500
2000-10-01	-21603964987.537000
2001-01-01	-16837459634.015100
2001-04-01	-19612326333.265400
2001-07-01	1411166909.339430
2001-10-01	10679226130.053100
2002-01-01	10216235170.358200
2002-04-01	-4691006069.523630
2002-07-01	22948814637.505300
2002-10-01	16180011338.246600
2003-01-01	-1598497047.772410
2003-04-01	-11226004316.383300
2003-07-01	14488386927.319800
2003-10-01	22853403141.361300
2004-01-01	18533566695.837000
2004-04-01	8254790888.272870
2004-07-01	17557874144.114800
2004-10-01	32115376311.585100
2005-01-01	395754160.660463
2005-04-01	-3840926252.202370
2005-07-01	6215853658.536590
2005-10-01	10048763082.778300
2006-01-01	-13780272654.370500
2006-04-01	-21697180443.252800
2006-07-01	-817011513.786804
2006-10-01	21587410783.386400
2007-01-01	3811292719.167910
2007-04-01	-9514693987.597730
2007-07-01	10440879926.672800
2007-10-01	5738298797.275760
2008-01-01	-59809728326.008800
2008-04-01	-60178078625.358000
2008-07-01	-54346695991.202600
2008-10-01	-34893617021.276600
2009-01-01	-35123379157.812600
2009-04-01	-17240127099.409900
2009-07-01	14026605635.817500
2009-10-01	24472557223.726300
2010-01-01	-20395295202.952000
2010-04-01	-11572281756.957100
2010-07-01	10795244044.285500
2010-10-01	25253585486.133100
2011-01-01	-24292029348.767300
2011-04-01	-18613989637.305700
2011-07-01	9232832870.522900
2011-10-01	49365400161.681500
2012-01-01	-6062685784.228010
2012-04-01	19145116477.879900
2012-07-01	51345985401.459900
2012-10-01	79703235853.954000