Quarter	Millions of US Dollars
1995-10-01	13999
1996-01-01	13729
1996-04-01	13909
1996-07-01	14321
1996-10-01	15022
1997-01-01	15313
1997-04-01	15015
1997-07-01	16803
1997-10-01	15645
1998-01-01	15359
1998-04-01	17182
1998-07-01	17399
1998-10-01	17661
1999-01-01	18760
1999-04-01	18970
1999-07-01	19669
1999-10-01	20728
2000-01-01	20805
2000-04-01	20746
2000-07-01	20903
2000-10-01	25821
2001-01-01	24232
2001-04-01	24171
2001-07-01	24139
2001-10-01	24004
2002-01-01	25118
2002-04-01	29259
2002-07-01	29008
2002-10-01	32490
2003-01-01	31320
2003-04-01	31819
2003-07-01	32265
2003-10-01	33866
2004-01-01	32264
2004-04-01	33957
2004-07-01	34401
2004-10-01	35374
2005-01-01	34100
2005-04-01	34428
2005-07-01	34522
2005-10-01	34306
2006-01-01	34889
2006-04-01	37704
2006-07-01	39466
2006-10-01	40572
2007-01-01	44175
2007-04-01	48145
2007-07-01	51357
2007-10-01	52204
2008-01-01	55555
2008-04-01	56080
2008-07-01	49538
2008-10-01	40558
2009-01-01	46780
2009-04-01	51875
2009-07-01	56789
2009-10-01	57690
2010-01-01	55861
2010-04-01	51885
2010-07-01	57783
2010-10-01	58665
2011-01-01	63250
2011-04-01	63641
2011-07-01	58328
2011-10-01	58965
2012-01-01	60369
2012-04-01	60627
2012-07-01	64218
2012-10-01	70528
2013-01-01	70549
2013-04-01	78904
2013-07-01	81890
2013-10-01	85634
2014-01-01	88522
2014-04-01	88787
2014-07-01	85575
2014-10-01	79160
2015-01-01	80596
2015-04-01	83503
2015-07-01	80988
2015-10-01	78247
2016-01-01	81058
2016-04-01	81392
2016-07-01	83677
2016-10-01	82035
2017-01-01	79683
2017-04-01	83094
2017-07-01	83561
2017-10-01	81112
2018-01-01	83243