Quarter	Billions of US Dollars
1990-04-01	0.11130
1994-10-01	5.83963
1995-04-01	0.25000
1996-04-01	0.08000
1996-07-01	0.16361
1996-10-01	0.05000
1997-01-01	0.05000
1997-04-01	1.00115
1997-10-01	0.56207
1998-04-01	0.10000
1998-10-01	1.03907
1999-04-01	0.66627
1999-10-01	0.97860
2000-01-01	1.14433
2000-04-01	0.36373
2000-10-01	0.02899
2001-01-01	1.53839
2001-04-01	0.17850
2001-10-01	1.05576
2002-01-01	0.65789
2002-04-01	1.00000
2002-07-01	0.40000
2002-10-01	0.62198
2003-01-01	1.60972
2003-04-01	1.11879
2003-07-01	1.46122
2003-10-01	1.91812
2004-01-01	3.06967
2004-04-01	1.62880
2004-10-01	0.30116
2005-01-01	4.60183
2005-04-01	7.83601
2005-07-01	1.52414
2005-10-01	2.11703
2006-01-01	4.20682
2006-04-01	0.18170
2006-10-01	0.82272
2007-01-01	2.18583
2007-04-01	1.70376
2007-10-01	0.44344
2008-04-01	4.04045
2009-01-01	4.23085
2009-04-01	2.99249
2009-07-01	4.49359
2009-10-01	3.38713
2010-01-01	6.32637
2010-04-01	0.13456
2010-07-01	3.25072
2010-10-01	1.76034
2011-01-01	2.08371
2011-04-01	3.30104
2011-07-01	0.61088
2011-10-01	2.24688
2012-01-01	5.41031
2012-04-01	3.11742
2012-07-01	4.60928
2012-10-01	7.29031
2013-01-01	2.97032
2013-04-01	0.45000
2013-07-01	0.96444
2013-10-01	2.51383
2014-01-01	5.55964
2014-04-01	3.08377
2014-07-01	1.38891
2015-04-01	1.16151