Quarter	US Dollars, Sum Over Component Sub-periods
1997-01-01	256000000
1997-04-01	277000000
1997-07-01	261000000
1997-10-01	356000000
1998-01-01	353000000
1998-04-01	636000000
1998-07-01	520000000
1998-10-01	432000000
1999-01-01	385000000
1999-04-01	353000000
1999-07-01	421000000
1999-10-01	455000000
2000-01-01	298000000
2000-04-01	308000000
2000-07-01	297000000
2000-10-01	389000000
2001-01-01	268000000
2001-04-01	295000000
2001-07-01	575000000
2001-10-01	406000000
2002-01-01	357000000
2002-04-01	417000000
2002-07-01	573000000
2002-10-01	644000000
2003-01-01	533000000
2003-04-01	614000000
2003-07-01	555000000
2003-10-01	768000000
2004-01-01	305000000
2004-04-01	-4000000
2004-07-01	181000000
2004-10-01	579000000
2005-01-01	441000000
2005-04-01	1057000000
2005-07-01	325000000
2005-10-01	135000000
2006-01-01	-9000000
2006-04-01	1329000000
2006-07-01	1280000000
2006-10-01	637000000
2007-01-01	964000000
2007-04-01	1118000000
2007-07-01	1135000000
2007-10-01	977000000
2008-01-01	264000000
2008-04-01	1567000000
2008-07-01	1800000000
2008-10-01	-53000000
2009-01-01	947000000
2009-04-01	1212000000
2009-07-01	861000000
2009-10-01	-802000000
2010-01-01	1739000000
2010-04-01	1641000000
2010-07-01	507000000
2010-10-01	-125000000
2011-01-01	1009000000
2011-04-01	3452000000
2011-07-01	991000000
2011-10-01	707000000
2012-01-01	537000000
2012-04-01	2356000000
2012-07-01	946000000
2012-10-01	1300000000
2013-01-01	430000000
2013-04-01	2843000000
2013-07-01	673000000
2013-10-01	1117000000
2014-01-01	1077000000