Quarter	US Dollars, Sum Over Component Sub-periods
1997-01-01	5766000000
1997-04-01	6692000000
1997-07-01	7018000000
1997-10-01	7753000000
1998-01-01	7055000000
1998-04-01	7670000000
1998-07-01	7801000000
1998-10-01	7594000000
1999-01-01	7011000000
1999-04-01	6282000000
1999-07-01	6216000000
1999-10-01	6840000000
2000-01-01	8519000000
2000-04-01	8550000000
2000-07-01	9090000000
2000-10-01	9743000000
2001-01-01	10154000000
2001-04-01	10042000000
2001-07-01	10515000000
2001-10-01	10952000000
2002-01-01	9799000000
2002-04-01	11426000000
2002-07-01	12410000000
2002-10-01	13107000000
2003-01-01	12996000000
2003-04-01	14893000000
2003-07-01	15802000000
2003-10-01	17316000000
2004-01-01	17846000000
2004-04-01	20193000000
2004-07-01	20560000000
2004-10-01	23263000000
2005-01-01	23128000000
2005-04-01	23893000000
2005-07-01	23744000000
2005-10-01	25630000000
2006-01-01	26159000000
2006-04-01	28608000000
2006-07-01	29687000000
2006-10-01	33014000000
2007-01-01	32584000000
2007-04-01	34841000000
2007-07-01	36411000000
2007-10-01	41501000000
2008-01-01	45307000000
2008-04-01	49713000000
2008-07-01	47956000000
2008-10-01	35451000000
2009-01-01	31386000000
2009-04-01	33539000000
2009-07-01	37007000000
2009-10-01	40153000000
2010-01-01	39998000000
2010-04-01	40049000000
2010-07-01	41113000000
2010-10-01	44549000000
2011-01-01	46998000000
2011-04-01	51251000000
2011-07-01	49812000000
2011-10-01	47142000000
2012-01-01	47476000000
2012-04-01	46588000000
2012-07-01	46717000000
2012-10-01	50045000000
2013-01-01	49314000000
2013-04-01	50064000000
2013-07-01	52676000000
2013-10-01	55179000000
2014-01-01	55817000000