Quarter	US Dollars, Sum Over Component Sub-periods
1997-01-01	8838000000
1997-04-01	9379000000
1997-07-01	9548000000
1997-10-01	10784000000
1998-01-01	10299000000
1998-04-01	10544000000
1998-07-01	11096000000
1998-10-01	11901000000
1999-01-01	9834000000
1999-04-01	9642000000
1999-07-01	10099000000
1999-10-01	11153000000
2000-01-01	11629000000
2000-04-01	12048000000
2000-07-01	11783000000
2000-10-01	12749000000
2001-01-01	12151000000
2001-04-01	12187000000
2001-07-01	12090000000
2001-10-01	12896000000
2002-01-01	11608000000
2002-04-01	13375000000
2002-07-01	13829000000
2002-10-01	15179000000
2003-01-01	14636000000
2003-04-01	16128000000
2003-07-01	17101000000
2003-10-01	18867000000
2004-01-01	18984000000
2004-04-01	22302000000
2004-07-01	22077000000
2004-10-01	24460000000
2005-01-01	23581000000
2005-04-01	24754000000
2005-07-01	24574000000
2005-10-01	26581000000
2006-01-01	27227000000
2006-04-01	30197000000
2006-07-01	31804000000
2006-10-01	35612000000
2007-01-01	36077000000
2007-04-01	39452000000
2007-07-01	40924000000
2007-10-01	47950000000
2008-01-01	51326000000
2008-04-01	58095000000
2008-07-01	56454000000
2008-10-01	43211000000
2009-01-01	32890000000
2009-04-01	35047000000
2009-07-01	39201000000
2009-10-01	42564000000
2010-01-01	41992000000
2010-04-01	42118000000
2010-07-01	44309000000
2010-10-01	49100000000
2011-01-01	49664000000
2011-04-01	55798000000
2011-07-01	53121000000
2011-10-01	50662000000
2012-01-01	50185000000
2012-04-01	48692000000
2012-07-01	47240000000
2012-10-01	51407000000
2013-01-01	49497000000
2013-04-01	48493000000
2013-07-01	51227000000
2013-10-01	54974000000
2014-01-01	54229000000