Quarter	Billions of US Dollars
1993-10-01	0.0635
1994-01-01	0.0920
1994-04-01	0.0911
1994-07-01	0.1226
1994-10-01	0.0784
1995-01-01	0.0612
1995-04-01	0.0633
1995-07-01	0.0590
1995-10-01	0.0472
1996-01-01	0.0368
1996-04-01	0.0365
1996-07-01	0.0320
1996-10-01	0.0199
1997-01-01	0.0198
1997-04-01	0.0151
1997-07-01	0.0153
1997-10-01	0.0148
1998-01-01	0.0141
1998-04-01	0.0243
1998-07-01	0.0218
1998-10-01	0.0223
1999-01-01	0.0105
1999-04-01	0.1159
1999-07-01	0.1175
1999-10-01	0.1161
2000-01-01	0.2280
2000-04-01	0.2115
2000-07-01	0.2237
2000-10-01	0.2199
2001-01-01	0.2207
2001-04-01	0.2323
2001-07-01	0.2210
2001-10-01	0.2302
2002-01-01	0.2331
2002-04-01	0.1000
2002-07-01	0.0984
2002-10-01	0.2892
2003-01-01	0.1837
2003-04-01	0.1891
2003-07-01	0.1814
2003-10-01	0.1764
2004-01-01	0.1867
2004-04-01	0.4454
2004-07-01	0.5155
2004-10-01	0.5222
2005-01-01	0.4854
2005-04-01	1.0843
2005-07-01	2.0734
2005-10-01	3.6819
2006-01-01	5.8810
2006-04-01	6.1870
2006-07-01	7.1731
2006-10-01	9.9428
2007-01-01	12.0371
2007-04-01	14.7806
2007-07-01	16.9038
2007-10-01	18.4800
2008-01-01	20.0779
2008-04-01	22.4101
2008-07-01	22.3046
2008-10-01	17.4049
2009-01-01	16.0777
2009-04-01	16.2186
2009-07-01	15.7124
2009-10-01	16.1161
2010-01-01	17.3251
2010-04-01	17.9226
2010-07-01	18.7051
2010-10-01	19.1760
2011-01-01	19.4670
2011-04-01	20.3199
2011-07-01	18.3904
2011-10-01	19.3610
2012-01-01	21.7225
2012-04-01	20.3110
2012-07-01	20.9307
2012-10-01	23.2836
2013-01-01	26.7930
2013-04-01	28.8504
2013-07-01	31.2290
2013-10-01	32.5527
2014-01-01	32.4819
2014-04-01	33.0024
2014-07-01	33.8665
2014-10-01	30.7656
2015-01-01	30.5571
2015-04-01	30.4577