Quarter	Billions of US Dollars
1993-07-01	24.787
1993-10-01	24.354
1994-01-01	27.597
1994-04-01	23.380
1994-07-01	23.264
1994-10-01	25.430
1995-01-01	25.820
1995-04-01	26.288
1995-07-01	30.604
1995-10-01	35.584
1996-01-01	37.005
1996-04-01	46.034
1996-07-01	37.307
1996-10-01	42.458
1997-01-01	38.801
1997-04-01	45.147
1997-07-01	50.378
1997-10-01	48.655
1998-01-01	54.875
1998-04-01	41.513
1998-07-01	54.557
1998-10-01	48.001
1999-01-01	54.365
1999-04-01	64.326
1999-07-01	72.250
1999-10-01	70.789
2000-01-01	89.571
2000-04-01	109.770
2000-07-01	96.797
2000-10-01	99.132
2001-01-01	86.513
2001-04-01	71.793
2001-07-01	64.939
2001-10-01	67.095
2002-01-01	60.341
2002-04-01	76.919
2002-07-01	80.383
2002-10-01	79.447
2003-01-01	89.385
2003-04-01	81.206
2003-07-01	76.330
2003-10-01	75.409
2004-01-01	114.585
2004-04-01	105.677
2004-07-01	101.329
2004-10-01	108.072
2005-01-01	118.855
2005-04-01	114.885
2005-07-01	123.749
2005-10-01	111.178
2006-01-01	119.713
2006-04-01	118.132
2006-07-01	111.918
2006-10-01	134.658
2007-01-01	150.075
2007-04-01	167.977
2007-07-01	198.224
2007-10-01	257.279
2008-01-01	288.921
2008-04-01	304.131
2008-07-01	238.785
2008-10-01	157.222
2009-01-01	176.813
2009-04-01	170.393
2009-07-01	203.282
2009-10-01	152.059
2010-01-01	190.468
2010-04-01	169.611
2010-07-01	205.217
2010-10-01	179.450
2011-01-01	184.220
2011-04-01	160.208
2011-07-01	148.343
2011-10-01	140.152
2012-01-01	260.157
2012-04-01	191.955
2012-07-01	148.612
2012-10-01	159.070
2013-01-01	196.848
2013-04-01	169.777
2013-07-01	141.831
2013-10-01	172.265
2014-01-01	171.669
2014-04-01	180.933
2014-07-01	173.126
2014-10-01	172.404
2015-01-01	192.725
2015-04-01	182.321