Quarter	US Dollars, sum over component sub-periods
1994-01-01	5333760000.00000000
1994-04-01	887380000.00000000
1994-07-01	6811330000.00000000
1994-10-01	7447410000.00000000
1995-01-01	1784040000.00000000
1995-04-01	-730390000.00000000
1995-07-01	-590810000.00000000
1995-10-01	593230000.00000000
1996-01-01	4385490000.00000000
1996-04-01	8868200000.00000000
1996-07-01	5245970000.00000000
1996-10-01	9619510000.00000000
1997-01-01	-3086190000.00000000
1997-04-01	6416760000.00000000
1997-07-01	8332330000.00000000
1997-10-01	8925610000.00000000
1998-01-01	2845620000.00000000
1998-04-01	2206440000.00000000
1998-07-01	3526120000.00000000
1998-10-01	6339390000.00000000
1999-01-01	5131300000.00000000
1999-04-01	450130000.00000000
1999-07-01	3655840000.00000000
1999-10-01	4052840000.00000000
2000-01-01	6603560000.00000000
2000-04-01	2399580000.00000000
2000-07-01	2523450000.00000000
2000-10-01	5906510000.00000000
2001-01-01	6150600000.00000000
2001-04-01	2750720000.00000000
2001-07-01	-10060070000.00000000
2001-10-01	1062460000.00000000
2002-01-01	5403480000.00000000
2002-04-01	-4743640000.00000000
2002-07-01	-4112380000.00000000
2002-10-01	1805420000.00000000
2003-01-01	2786870000.00000000
2003-04-01	267339999.99999997
2003-07-01	10184580000.00000000
2003-10-01	2737680000.00000000
2004-01-01	6717280000.00000000
2004-04-01	10689020000.00000000
2004-07-01	7788650000.00000000
2004-10-01	1519170000.00000000
2005-01-01	10351790000.00000000
2005-04-01	14593080000.00000000
2005-07-01	-1849390000.00000000
2005-10-01	10909920000.00000000
2006-01-01	18405170000.00000000
2006-04-01	1713070000.00000000
2006-07-01	11762590000.00000000
2006-10-01	19114260000.00000000
2007-01-01	20649570000.00000000
2007-04-01	-3214420000.00000000
2007-07-01	32364630000.00000000
2007-10-01	10130290000.00000000
2008-01-01	34771140000.00000000
2008-04-01	22024650000.00000000
2008-07-01	45348410000.00000000
2008-10-01	83631080000.00000000
2009-01-01	-1202430000.00000000
2009-04-01	-6885300000.00000000
2009-07-01	15440630000.00000000
2009-10-01	-16603180000.00000000
2010-01-01	3784270000.00000000
2010-04-01	-8641850000.00000000
2010-07-01	15008570000.00000000
2010-10-01	9084160000.00000000
2011-01-01	22314120000.00000000
2011-04-01	15428320000.00000000
2011-07-01	11776550000.00000000
2011-10-01	33851510000.00000400
2012-01-01	31890810000.00000000
2012-04-01	9541530000.00000000
2012-07-01	13616130000.00000000
2012-10-01	28655140000.00000000
2013-01-01	31819960000.00000000
2013-04-01	29538740000.00000000
2013-07-01	3002090000.00000000
2013-10-01	16463700000.00000000
2014-01-01	32905400000.00000000
2014-04-01	22224390000.00000000
2014-07-01	-29439140000.00000000
2014-10-01	-1681590000.00000000
2015-01-01	-2251550000.00000000
2015-04-01	7363700000.00000000
2015-07-01	-11157260000.00000000
2015-10-01	-12362440000.00000000
2016-01-01	-8398240000.00000000
2016-04-01	-6519260000.00000000
2016-07-01	-5128070000.00000000
2016-10-01	14599040000.00000000
2017-01-01	4034790000.00000000
2017-04-01	-1135670000.00000000
2017-07-01	-10699970000.00000000
2017-10-01	-662680000.00000000
2018-01-01	9121900000.00000000
2018-04-01	-7060140000.00000000