Quarter	Billions of US Dollars
1987-01-01	0.04900
1987-04-01	0.04900
1987-07-01	0.04900
1987-10-01	0.03900
1988-01-01	0.03900
1988-04-01	0.03900
1988-07-01	0.03500
1988-10-01	0.03500
1989-01-01	0.03500
1989-04-01	0.03500
1989-07-01	0.03500
1989-10-01	0.03500
1990-01-01	0.03500
1990-04-01	0.03500
1990-07-01	0.03500
1990-10-01	0.03500
1991-01-01	0.03500
1991-04-01	0.03500
1991-07-01	0.03500
1991-10-01	0.03500
1992-01-01	0.03500
1992-04-01	0.03500
1992-07-01	0.03500
1992-10-01	0.03500
1993-01-01	0.03500
1993-04-01	0.03500
1993-07-01	0.03500
1993-10-01	0.03500
1994-01-01	0.03500
1994-04-01	0.03500
1994-07-01	0.03500
1994-10-01	0.09516
1995-01-01	0.10215
1995-04-01	0.10592
1995-07-01	0.09604
1995-10-01	0.07735
1996-01-01	0.07545
1996-04-01	0.05483
1996-07-01	0.05407
1996-10-01	0.05172
1997-01-01	0.04837
1997-04-01	0.05245
1997-07-01	0.04959
1997-10-01	0.04617
1998-01-01	0.04544
1998-04-01	0.04260
1998-07-01	0.04436
1998-10-01	0.05190
1999-01-01	0.04983
1999-04-01	0.04955
1999-07-01	0.05615
1999-10-01	0.05871
2004-07-01	1.63351
2004-10-01	1.91243
2005-01-01	1.92695
2005-04-01	1.79536
2005-07-01	1.89658
2005-10-01	1.85352
2006-01-01	1.65112
2006-04-01	1.52754
2006-07-01	2.23948
2006-10-01	2.41920
2007-01-01	2.48290
2007-04-01	2.38652
2007-07-01	2.10373
2007-10-01	2.13028
2008-01-01	1.75541
2008-04-01	3.35226
2008-07-01	3.05666
2008-10-01	2.77815
2009-01-01	2.68721
2009-04-01	2.75736
2009-07-01	2.84686
2009-10-01	2.80827
2010-01-01	2.66421
2010-04-01	2.51067
2010-07-01	2.80483
2010-10-01	2.75250
2011-01-01	2.87112
2011-04-01	2.89936
2011-07-01	2.74455
2011-10-01	2.63415
2012-01-01	2.66010
2012-04-01	2.56584
2012-07-01	2.62567
2012-10-01	2.62100
2013-01-01	2.60192
2013-04-01	2.64274
2013-07-01	2.72065
2013-10-01	2.80391
2014-01-01	2.82907
2014-04-01	2.81069
2014-07-01	2.59113
2014-10-01	2.49107
2015-01-01	2.31133
2015-04-01	2.36725