Quarter	Billions of US Dollars
1993-07-01	0.8466
1993-10-01	1.3343
1994-01-01	1.5260
1994-04-01	1.5338
1994-07-01	1.7320
1994-10-01	1.7738
1995-01-01	1.9611
1995-04-01	2.1569
1995-07-01	2.2976
1995-10-01	2.4220
1996-01-01	2.3650
1996-04-01	2.2987
1996-07-01	2.2912
1996-10-01	2.2283
1997-01-01	2.0905
1997-04-01	2.0422
1997-07-01	2.0294
1997-10-01	2.0230
1998-01-01	1.9647
1998-04-01	1.9671
1998-07-01	2.3353
1998-10-01	2.3449
1999-01-01	2.1404
1999-04-01	2.0741
1999-07-01	1.9357
1999-10-01	1.7734
2000-01-01	1.7028
2000-04-01	1.7136
2000-07-01	1.5233
2000-10-01	1.4546
2001-01-01	1.3880
2001-04-01	1.2450
2001-07-01	1.3315
2001-10-01	4.6935
2002-01-01	4.5450
2002-04-01	5.1208
2002-07-01	4.8090
2002-10-01	5.0955
2003-01-01	5.2853
2003-04-01	5.4485
2003-07-01	5.4945
2003-10-01	6.0485
2004-01-01	5.8635
2004-04-01	5.8335
2004-07-01	5.9496
2004-10-01	6.5696
2005-01-01	6.2641
2005-04-01	5.8043
2005-07-01	5.9588
2005-10-01	6.0925
2006-01-01	6.2419
2006-04-01	6.8113
2006-07-01	6.8256
2006-10-01	7.2439
2007-01-01	7.3209
2007-04-01	7.4167
2007-07-01	7.7885
2007-10-01	8.5354
2008-01-01	9.2107
2008-04-01	9.1646
2008-07-01	8.2746
2008-10-01	8.6182
2009-01-01	8.2245
2009-04-01	8.9047
2009-07-01	9.2899
2009-10-01	9.1813
2010-01-01	15.3321
2010-04-01	14.0727
2010-07-01	15.5158
2010-10-01	15.2978
2011-01-01	16.1225
2011-04-01	16.8448
2011-07-01	15.8017
2011-10-01	15.2182
2012-01-01	15.7281
2012-04-01	14.9614
2012-07-01	10.1845
2012-10-01	10.4117
2013-01-01	10.2167
2013-04-01	10.4349
2013-07-01	10.7821
2013-10-01	11.2141
2014-01-01	11.1812
2014-04-01	11.1192
2014-07-01	10.0871
2014-10-01	9.3909
2015-01-01	8.4846
2015-04-01	8.5339