Quarter	Billions of US Dollars
1989-10-01	28.403
1990-01-01	26.757
1990-04-01	28.332
1990-07-01	30.186
1990-10-01	30.946
1991-01-01	30.322
1991-04-01	31.035
1991-07-01	33.363
1991-10-01	36.498
1992-01-01	35.013
1992-04-01	41.299
1992-07-01	42.605
1992-10-01	39.972
1993-01-01	41.835
1993-04-01	45.266
1993-07-01	46.337
1993-10-01	47.014
1994-01-01	50.183
1994-04-01	51.414
1994-07-01	54.960
1994-10-01	57.989
1995-01-01	58.337
1995-04-01	61.296
1995-07-01	65.076
1995-10-01	65.912
1996-01-01	62.352
1996-04-01	58.729
1996-07-01	58.633
1996-10-01	57.397
1997-01-01	62.307
1997-04-01	63.119
1997-07-01	61.821
1997-10-01	60.671
1998-01-01	59.818
1998-04-01	52.692
1998-07-01	53.763
1998-10-01	54.419
1999-01-01	52.623
1999-04-01	55.059
1999-07-01	56.062
1999-10-01	53.837
2000-01-01	50.706
2000-04-01	49.283
2000-07-01	46.600
2000-10-01	44.319
2001-01-01	52.724
2001-04-01	53.126
2001-07-01	48.422
2001-10-01	36.776
2002-01-01	37.588
2002-04-01	42.080
2002-07-01	42.771
2002-10-01	50.883
2003-01-01	55.445
2003-04-01	60.041
2003-07-01	68.732
2003-10-01	74.681
2004-01-01	76.592
2004-04-01	81.322
2004-07-01	82.255
2004-10-01	98.637
2005-01-01	87.610
2005-04-01	85.944
2005-07-01	93.627
2005-10-01	97.129
2006-01-01	97.212
2006-04-01	88.620
2006-07-01	86.545
2006-10-01	98.957
2007-01-01	93.324
2007-04-01	97.891
2007-07-01	103.579
2007-10-01	107.722
2008-01-01	88.787
2008-04-01	94.302
2008-07-01	92.041
2008-10-01	83.076
2009-01-01	82.428
2009-04-01	106.475
2009-07-01	116.512
2009-10-01	124.444
2010-01-01	132.700
2010-04-01	135.289
2010-07-01	153.492
2010-10-01	169.487
2011-01-01	173.934
2011-04-01	180.559
2011-07-01	157.455
2011-10-01	162.130
2012-01-01	181.662
2012-04-01	179.303
2012-07-01	184.104
2012-10-01	187.846
2013-01-01	175.390
2013-04-01	166.270
2013-07-01	172.704
2013-10-01	172.459
2014-01-01	174.586
2014-04-01	182.537
2014-07-01	173.767
2014-10-01	175.301
2015-01-01	171.347