Quarter	Billions of US Dollars
1993-07-01	6.562
1993-10-01	6.718
1994-01-01	8.756
1994-04-01	10.483
1994-07-01	9.648
1994-10-01	8.538
1995-01-01	7.915
1995-04-01	8.193
1995-07-01	9.756
1995-10-01	9.724
1996-01-01	10.330
1996-04-01	10.958
1996-07-01	9.958
1996-10-01	9.983
1997-01-01	10.647
1997-04-01	11.693
1997-07-01	13.301
1997-10-01	14.112
1998-01-01	15.057
1998-04-01	14.438
1998-07-01	14.780
1998-10-01	14.148
1999-01-01	13.127
1999-04-01	14.432
1999-07-01	17.905
1999-10-01	18.611
2000-01-01	20.656
2000-04-01	22.283
2000-07-01	20.740
2000-10-01	20.550
2001-01-01	20.281
2001-04-01	18.555
2001-07-01	19.651
2001-10-01	19.230
2002-01-01	19.216
2002-04-01	20.265
2002-07-01	22.452
2002-10-01	17.913
2003-01-01	19.099
2003-04-01	20.079
2003-07-01	18.971
2003-10-01	25.417
2004-01-01	29.098
2004-04-01	26.814
2004-07-01	32.468
2004-10-01	34.051
2005-01-01	32.974
2005-04-01	40.921
2005-07-01	42.980
2005-10-01	41.581
2006-01-01	45.388
2006-04-01	48.170
2006-07-01	47.064
2006-10-01	49.038
2007-01-01	58.932
2007-04-01	61.104
2007-07-01	64.337
2007-10-01	77.307
2008-01-01	85.745
2008-04-01	91.039
2008-07-01	95.989
2008-10-01	74.979
2009-01-01	76.491
2009-04-01	93.266
2009-07-01	93.103
2009-10-01	91.435
2010-01-01	98.404
2010-04-01	81.851
2010-07-01	88.538
2010-10-01	91.093
2011-01-01	89.938
2011-04-01	86.549
2011-07-01	94.693
2011-10-01	85.365
2012-01-01	91.986
2012-04-01	99.919
2012-07-01	92.090
2012-10-01	91.998
2013-01-01	92.028
2013-04-01	100.385
2013-07-01	110.520
2013-10-01	102.129
2014-01-01	93.931
2014-04-01	88.049
2014-07-01	84.990
2014-10-01	79.962
2015-01-01	77.033
2015-04-01	87.976