Quarter	Millions of US Dollars
1995-10-01	9518
1996-01-01	9316
1996-04-01	9131
1996-07-01	9364
1996-10-01	9820
1997-01-01	9916
1997-04-01	9269
1997-07-01	9803
1997-10-01	9260
1998-01-01	8700
1998-04-01	8771
1998-07-01	8744
1998-10-01	8376
1999-01-01	8724
1999-04-01	9096
1999-07-01	9262
1999-10-01	9012
2000-01-01	8902
2000-04-01	8995
2000-07-01	9010
2000-10-01	9166
2001-01-01	9630
2001-04-01	9738
2001-07-01	10316
2001-10-01	9887
2002-01-01	10844
2002-04-01	13715
2002-07-01	13660
2002-10-01	15974
2003-01-01	14978
2003-04-01	15623
2003-07-01	15906
2003-10-01	17008
2004-01-01	16084
2004-04-01	17015
2004-07-01	17524
2004-10-01	19975
2005-01-01	19609
2005-04-01	20261
2005-07-01	21127
2005-10-01	20402
2006-01-01	21505
2006-04-01	23762
2006-07-01	26078
2006-10-01	25952
2007-01-01	28517
2007-04-01	31366
2007-07-01	33880
2007-10-01	34291
2008-01-01	35381
2008-04-01	35726
2008-07-01	30475
2008-10-01	22855
2009-01-01	25068
2009-04-01	26596
2009-07-01	30652
2009-10-01	30612
2010-01-01	29635
2010-04-01	27295
2010-07-01	29971
2010-10-01	30959
2011-01-01	34030
2011-04-01	35231
2011-07-01	31930
2011-10-01	30781
2012-01-01	32077
2012-04-01	31299
2012-07-01	34676
2012-10-01	37466
2013-01-01	37679
2013-04-01	40598
2013-07-01	41633
2013-10-01	41517
2014-01-01	43735
2014-04-01	44398
2014-07-01	43079
2014-10-01	36705
2015-01-01	33723
2015-04-01	36377
2015-07-01	32684
2015-10-01	31322
2016-01-01	32663
2016-04-01	33175
2016-07-01	33961
2016-10-01	33110
2017-01-01	33971
2017-04-01	35583
2017-07-01	37847
2017-10-01	39341
2018-01-01	42614