Quarter	Billions of US Dollars
1993-07-01	43.363
1993-10-01	41.961
1994-01-01	43.348
1994-04-01	45.174
1994-07-01	46.787
1994-10-01	47.710
1995-01-01	51.713
1995-04-01	51.779
1995-07-01	51.484
1995-10-01	51.382
1996-01-01	51.113
1996-04-01	50.216
1996-07-01	49.918
1996-10-01	49.232
1997-01-01	47.264
1997-04-01	48.564
1997-07-01	48.630
1997-10-01	46.137
1998-01-01	46.234
1998-04-01	49.012
1998-07-01	54.597
1998-10-01	58.828
1999-01-01	62.549
1999-04-01	68.044
1999-07-01	77.653
1999-10-01	75.300
2000-01-01	73.043
2000-04-01	81.424
2000-07-01	86.064
2000-10-01	96.613
2001-01-01	116.677
2001-04-01	118.087
2001-07-01	133.924
2001-10-01	139.496
2002-01-01	131.748
2002-04-01	149.940
2002-07-01	151.463
2002-10-01	164.349
2003-01-01	173.534
2003-04-01	190.411
2003-07-01	194.596
2003-10-01	211.940
2004-01-01	198.327
2004-04-01	202.033
2004-07-01	208.171
2004-10-01	229.701
2005-01-01	216.696
2005-04-01	207.410
2005-07-01	202.377
2005-10-01	206.699
2006-01-01	213.549
2006-04-01	232.495
2006-07-01	231.733
2006-10-01	248.111
2007-01-01	252.382
2007-04-01	269.394
2007-07-01	281.560
2007-10-01	286.301
2008-01-01	304.483
2008-04-01	325.286
2008-07-01	295.111
2008-10-01	285.586
2009-01-01	289.248
2009-04-01	344.439
2009-07-01	368.534
2009-10-01	371.563
2010-01-01	365.122
2010-04-01	344.535
2010-07-01	381.125
2010-10-01	384.644
2011-01-01	413.475
2011-04-01	426.381
2011-07-01	408.157
2011-10-01	405.244
2012-01-01	428.180
2012-04-01	415.304
2012-07-01	429.936
2012-10-01	442.794
2013-01-01	435.776
2013-04-01	444.797
2013-07-01	462.064
2013-10-01	472.262
2014-01-01	483.939
2014-04-01	499.627
2014-07-01	466.795
2014-10-01	454.717
2015-01-01	414.339
2015-04-01	420.041