Quarter	Billions of US Dollars
1984-07-01	0.050
1984-10-01	0.050
1985-01-01	0.050
1985-04-01	0.050
1985-07-01	0.050
1985-10-01	0.050
1986-01-01	0.050
1986-04-01	0.150
1986-07-01	0.150
1986-10-01	0.150
1987-01-01	0.100
1987-04-01	0.100
1987-07-01	0.100
1987-10-01	0.100
1988-01-01	0.173
1988-04-01	0.166
1988-07-01	0.429
1988-10-01	0.447
1989-01-01	0.875
1989-04-01	0.853
1989-07-01	1.348
1989-10-01	1.470
1990-01-01	1.770
1990-04-01	1.796
1990-07-01	1.912
1990-10-01	1.991
1991-01-01	1.750
1991-04-01	1.662
1991-07-01	1.925
1991-10-01	2.087
1992-01-01	1.943
1992-04-01	2.073
1992-07-01	2.246
1992-10-01	1.989
1993-01-01	1.982
1993-04-01	1.813
1993-07-01	1.840
1993-10-01	1.734
1994-01-01	1.693
1994-04-01	1.772
1994-07-01	1.776
1994-10-01	1.773
1995-01-01	1.625
1995-04-01	1.624
1995-07-01	1.134
1995-10-01	1.123
1996-01-01	1.166
1996-04-01	1.131
1996-07-01	0.163
1996-10-01	1.282
1997-01-01	2.624
1997-04-01	5.638
1997-07-01	6.649
1997-10-01	8.165
1998-01-01	8.951
1998-04-01	13.934
1998-07-01	20.605
1998-10-01	20.451
1999-01-01	20.120
1999-04-01	19.822
1999-07-01	19.710
1999-10-01	19.278
2000-01-01	19.048
2000-04-01	18.768
2000-07-01	38.404
2000-10-01	38.546
2001-01-01	38.272
2001-04-01	37.833
2001-07-01	37.970
2001-10-01	38.141
2002-01-01	38.776
2002-04-01	39.490
2002-07-01	39.454
2002-10-01	41.488
2003-01-01	44.027
2003-04-01	43.985
2003-07-01	45.665
2003-10-01	48.307
2004-01-01	48.646
2004-04-01	50.570
2004-07-01	53.659
2004-10-01	56.227
2005-01-01	58.156
2005-04-01	63.136
2005-07-01	64.316
2005-10-01	69.123
2006-01-01	71.258
2006-04-01	73.990
2006-07-01	78.141
2006-10-01	93.670
2007-01-01	103.771
2007-04-01	117.174
2007-07-01	119.775
2007-10-01	130.427
2008-01-01	132.041
2008-04-01	142.178
2008-07-01	141.541
2008-10-01	137.751
2009-01-01	132.675
2009-04-01	137.076
2009-07-01	138.218
2009-10-01	135.331
2010-01-01	135.064
2010-04-01	138.131
2010-07-01	148.352
2010-10-01	162.131
2011-01-01	168.411
2011-04-01	175.114
2011-07-01	170.252
2011-10-01	169.437
2012-01-01	173.958
2012-04-01	191.712
2012-07-01	222.546
2012-10-01	241.189
2013-01-01	250.207
2013-04-01	260.297
2013-07-01	267.225
2013-10-01	275.733
2014-01-01	262.737
2014-04-01	260.452
2014-07-01	252.098
2014-10-01	246.138
2015-01-01	237.102
2015-04-01	233.747