Quarter	US Dollars, Sum Over Component Sub-periods
1994-01-01	1159000000
1994-04-01	1340000000
1994-07-01	1371000000
1994-10-01	1470000000
1995-01-01	1653000000
1995-04-01	1555000000
1995-07-01	2483000000
1995-10-01	1959000000
1996-01-01	2122000000
1996-04-01	2408000000
1996-07-01	2353000000
1996-10-01	2885000000
1997-01-01	3487000000
1997-04-01	3087000000
1997-07-01	3476000000
1997-10-01	3008000000
1998-01-01	4205000000
1998-04-01	4125000000
1998-07-01	4651000000
1998-10-01	3110000000
1999-01-01	3410000000
1999-04-01	2594000000
1999-07-01	3403000000
1999-10-01	2190000000
2000-01-01	3502000000
2000-04-01	2434000000
2000-07-01	3517000000
2000-10-01	2037000000
2001-01-01	3545000000
2001-04-01	2288000000
2001-07-01	3214000000
2001-10-01	1991000000
2002-01-01	3257000000
2002-04-01	2178000000
2002-07-01	4133000000
2002-10-01	2692000000
2003-01-01	6041000000
2003-04-01	5215000000
2003-07-01	6874000000
2003-10-01	6098000000
2004-01-01	7452000000
2004-04-01	3451000000
2004-07-01	6632000000
2004-10-01	7234000000
2005-01-01	7271000000
2005-04-01	9330000000
2005-07-01	10142000000
2005-10-01	9682000000
2006-01-01	10473000000
2006-04-01	15393000000
2006-07-01	18195000000
2006-10-01	15128000000
2007-01-01	13745000000
2007-04-01	22550000000
2007-07-01	20046000000
2007-10-01	21808000000
2008-01-01	23051000000
2008-04-01	34690000000
2008-07-01	30848000000
2008-10-01	22347000000
2009-01-01	13768000000
2009-04-01	19827000000
2009-07-01	18869000000
2009-10-01	21004000000
2010-01-01	16806000000
2010-04-01	24131000000
2010-07-01	22029000000
2010-10-01	23009000000
2011-01-01	22600000000
2011-04-01	30623000000
2011-07-01	24567000000
2011-10-01	24793000000
2012-01-01	23596000000
2012-04-01	30860000000