Quarter	Billions of US Dollars
1989-10-01	0.319
1990-01-01	0.296
1990-04-01	0.276
1990-07-01	0.259
1990-10-01	0.244
1991-01-01	0.232
1991-04-01	0.220
1991-07-01	0.208
1991-10-01	0.208
1992-01-01	0.200
1992-04-01	0.194
1992-07-01	0.187
1992-10-01	0.436
1993-01-01	0.423
1993-04-01	0.410
1993-07-01	0.398
1993-10-01	0.774
1994-01-01	0.936
1994-04-01	1.007
1994-07-01	1.049
1994-10-01	1.132
1995-01-01	1.221
1995-04-01	1.372
1995-07-01	1.381
1995-10-01	1.495
1996-01-01	1.527
1996-04-01	1.613
1996-07-01	1.805
1996-10-01	1.964
1997-01-01	2.142
1997-04-01	2.353
1997-07-01	2.297
1997-10-01	2.442
1998-01-01	2.701
1998-04-01	3.064
1998-07-01	3.011
1998-10-01	3.446
1999-01-01	3.057
1999-04-01	2.413
1999-07-01	1.821
1999-10-01	1.689
2000-01-01	1.635
2000-04-01	1.505
2000-07-01	1.467
2000-10-01	1.496
2001-01-01	1.369
2001-04-01	1.325
2001-07-01	1.265
2001-10-01	1.233
2002-01-01	1.076
2002-04-01	1.118
2002-07-01	0.821
2002-10-01	1.223
2003-01-01	1.192
2003-04-01	1.160
2003-07-01	1.308
2003-10-01	1.277
2004-01-01	0.832
2004-04-01	0.259
2004-07-01	0.259
2005-10-01	0.308
2006-01-01	0.605
2006-04-01	0.476
2006-07-01	0.101
2006-10-01	0.316
2007-01-01	0.375
2007-04-01	0.413
2014-07-01	1.347
2014-10-01	2.068
2015-01-01	1.920