Quarter	Billions of US Dollars
1995-10-01	3.081
1996-01-01	3.020
1996-04-01	3.235
1996-07-01	3.967
1996-10-01	5.480
1997-01-01	5.838
1997-04-01	5.986
1997-07-01	6.401
1997-10-01	6.660
1998-01-01	7.735
1998-04-01	8.631
1998-07-01	9.693
1998-10-01	10.899
1999-01-01	9.936
1999-04-01	10.050
1999-07-01	10.340
1999-10-01	10.144
2000-01-01	10.706
2000-04-01	12.754
2000-07-01	11.770
2000-10-01	12.873
2001-01-01	14.207
2001-04-01	15.432
2001-07-01	16.734
2001-10-01	17.544
2002-01-01	18.592
2002-04-01	21.806
2002-07-01	24.070
2002-10-01	27.271
2003-01-01	26.862
2003-04-01	27.639
2003-07-01	27.961
2003-10-01	29.553
2004-01-01	29.036
2004-04-01	31.767
2004-07-01	34.486
2004-10-01	41.366
2005-01-01	40.370
2005-04-01	39.794
2005-07-01	43.351
2005-10-01	45.409
2006-01-01	47.686
2006-04-01	53.153
2006-07-01	58.382
2006-10-01	67.474
2007-01-01	72.866
2007-04-01	82.747
2007-07-01	95.225
2007-10-01	110.265
2008-01-01	129.803
2008-04-01	145.515
2008-07-01	141.836
2008-10-01	129.448
2009-01-01	117.199
2009-04-01	132.789
2009-07-01	147.039
2009-10-01	152.208
2010-01-01	152.735
2010-04-01	140.033
2010-07-01	163.394
2010-10-01	166.015
2011-01-01	175.734
2011-04-01	187.362
2011-07-01	167.252
2011-10-01	159.728
2012-01-01	175.691
2012-04-01	165.165
2012-07-01	175.004
2012-10-01	179.846
2013-01-01	172.641
2013-04-01	173.712
2013-07-01	185.446
2013-10-01	192.846
2014-01-01	195.155
2014-04-01	197.485
2014-07-01	184.889
2014-10-01	173.975
2015-01-01	165.553
2015-04-01	171.766
2015-07-01	170.118
2015-10-01	165.586
2016-01-01	174.365
2016-04-01	167.310
2016-07-01	173.702
2016-10-01	162.923
2017-01-01	172.130
2017-04-01	186.359
2017-07-01	190.773
2017-10-01	199.402
2018-01-01	206.451