Quarter	Millions of US Dollars
1995-10-01	20187
1996-01-01	19848
1996-04-01	18621
1996-07-01	19545
1996-10-01	20552
1997-01-01	21514
1997-04-01	19549
1997-07-01	19949
1997-10-01	20701
1998-01-01	21295
1998-04-01	21258
1998-07-01	22809
1998-10-01	23138
1999-01-01	24151
1999-04-01	21128
1999-07-01	21131
1999-10-01	20717
2000-01-01	19545
2000-04-01	18548
2000-07-01	17815
2000-10-01	19712
2001-01-01	19293
2001-04-01	19804
2001-07-01	21009
2001-10-01	20676
2002-01-01	22085
2002-04-01	27124
2002-07-01	28619
2002-10-01	31738
2003-01-01	30761
2003-04-01	31744
2003-07-01	32434
2003-10-01	34907
2004-01-01	34542
2004-04-01	35138
2004-07-01	37529
2004-10-01	43113
2005-01-01	41107
2005-04-01	40106
2005-07-01	42267
2005-10-01	42164
2006-01-01	44908
2006-04-01	46265
2006-07-01	46436
2006-10-01	52914
2007-01-01	49715
2007-04-01	50929
2007-07-01	57302
2007-10-01	57682
2008-01-01	61408
2008-04-01	65175
2008-07-01	58556
2008-10-01	58952
2009-01-01	72625
2009-04-01	89184
2009-07-01	111254
2009-10-01	113539
2010-01-01	109408
2010-04-01	101013
2010-07-01	116010
2010-10-01	117156
2011-01-01	125981
2011-04-01	132837
2011-07-01	125562
2011-10-01	129456
2012-01-01	137498
2012-04-01	132420
2012-07-01	142969
2012-10-01	147926
2013-01-01	143442
2013-04-01	140202
2013-07-01	141296
2013-10-01	138360
2014-01-01	144274
2014-04-01	134821
2014-07-01	126702
2014-10-01	109403
2015-01-01	98435
2015-04-01	101400
2015-07-01	95417
2015-10-01	90298
2016-01-01	99197
2016-04-01	97767
2016-07-01	104280
2016-10-01	99794
2017-01-01	103684
2017-04-01	107358
2017-07-01	113296
2017-10-01	108963
2018-01-01	116316