Quarter	Billions of US Dollars
1993-07-01	5.3736
1993-10-01	5.2658
1994-01-01	6.7281
1994-04-01	7.4350
1994-07-01	7.4502
1994-10-01	6.6862
1995-01-01	4.2432
1995-04-01	5.2457
1995-07-01	7.7199
1995-10-01	9.1436
1996-01-01	10.1431
1996-04-01	10.0964
1996-07-01	7.8667
1996-10-01	8.8461
1997-01-01	9.5435
1997-04-01	10.5296
1997-07-01	12.5197
1997-10-01	11.8429
1998-01-01	12.7111
1998-04-01	12.7586
1998-07-01	10.6478
1998-10-01	12.7533
1999-01-01	10.8192
1999-04-01	10.4523
1999-07-01	10.4776
1999-10-01	10.0601
2000-01-01	11.3508
2000-04-01	12.8504
2000-07-01	12.6926
2000-10-01	11.8433
2001-01-01	12.9181
2001-04-01	13.2470
2001-07-01	15.5509
2001-10-01	15.4836
2002-01-01	14.7107
2002-04-01	15.6194
2002-07-01	14.9668
2002-10-01	15.9172
2003-01-01	16.9661
2003-04-01	20.0830
2003-07-01	20.2628
2003-10-01	22.5641
2004-01-01	22.0894
2004-04-01	19.4089
2004-07-01	19.5578
2004-10-01	17.1235
2005-01-01	17.0901
2005-04-01	16.2822
2005-07-01	16.2113
2005-10-01	17.0967
2006-01-01	19.0239
2006-04-01	21.2248
2006-07-01	24.8019
2006-10-01	24.9924
2007-01-01	24.6441
2007-04-01	23.4791
2007-07-01	21.6331
2007-10-01	25.0745
2008-01-01	26.9950
2008-04-01	24.6519
2008-07-01	23.2226
2008-10-01	21.4101
2009-01-01	17.4054
2009-04-01	15.1155
2009-07-01	16.0907
2009-10-01	15.6837
2010-01-01	19.8586
2010-04-01	25.6526
2010-07-01	29.9667
2010-10-01	28.3509
2011-01-01	29.2393
2011-04-01	32.1851
2011-07-01	28.8091
2011-10-01	36.1031
2012-01-01	39.6124
2012-04-01	35.2633
2012-07-01	42.9119
2012-10-01	40.7980
2013-01-01	33.3826
2013-04-01	45.8363
2013-07-01	48.3756
2013-10-01	50.1462
2014-01-01	56.2776
2014-04-01	45.2223
2014-07-01	36.6139
2014-10-01	38.3079
2015-01-01	34.2905
2015-04-01	37.4829