Quarter	Billions of US Dollars
1993-07-01	73.418
1993-10-01	76.760
1994-01-01	76.451
1994-04-01	77.086
1994-07-01	82.242
1994-10-01	79.287
1995-01-01	79.448
1995-04-01	79.827
1995-07-01	81.114
1995-10-01	79.528
1996-01-01	79.941
1996-04-01	78.073
1996-07-01	75.831
1996-10-01	72.615
1997-01-01	71.675
1997-04-01	70.179
1997-07-01	68.422
1997-10-01	63.395
1998-01-01	59.981
1998-04-01	57.390
1998-07-01	53.766
1998-10-01	51.352
1999-01-01	51.854
1999-04-01	55.391
1999-07-01	54.352
1999-10-01	53.166
2000-01-01	52.185
2000-04-01	51.114
2000-07-01	48.801
2000-10-01	47.656
2001-01-01	43.512
2001-04-01	46.004
2001-07-01	43.044
2001-10-01	42.302
2002-01-01	43.782
2002-04-01	46.961
2002-07-01	45.822
2002-10-01	46.515
2003-01-01	49.573
2003-04-01	61.916
2003-07-01	66.344
2003-10-01	70.598
2004-01-01	73.884
2004-04-01	74.330
2004-07-01	83.603
2004-10-01	95.047
2005-01-01	100.888
2005-04-01	102.595
2005-07-01	113.797
2005-10-01	117.252
2006-01-01	124.290
2006-04-01	137.218
2006-07-01	144.025
2006-10-01	145.408
2007-01-01	159.376
2007-04-01	188.738
2007-07-01	205.473
2007-10-01	217.131
2008-01-01	218.700
2008-04-01	235.790
2008-07-01	224.549
2008-10-01	193.137
2009-01-01	191.152
2009-04-01	215.629
2009-07-01	230.526
2009-10-01	245.972
2010-01-01	253.938
2010-04-01	254.040
2010-07-01	262.371
2010-10-01	278.624
2011-01-01	283.666
2011-04-01	294.479
2011-07-01	263.668
2011-10-01	267.575
2012-01-01	274.940
2012-04-01	252.479
2012-07-01	263.191
2012-10-01	238.909
2013-01-01	233.964
2013-04-01	210.068
2013-07-01	218.910
2013-10-01	210.667
2014-01-01	196.801
2014-04-01	198.149
2014-07-01	181.642
2014-10-01	168.957
2015-01-01	150.446
2015-04-01	147.275