Quarter	Millions of US Dollars
1995-10-01	35172
1996-01-01	38237
1996-04-01	36629
1996-07-01	38972
1996-10-01	38070
1997-01-01	42200
1997-04-01	41345
1997-07-01	44985
1997-10-01	43334
1998-01-01	48509
1998-04-01	51305
1998-07-01	53907
1998-10-01	52118
1999-01-01	55152
1999-04-01	51468
1999-07-01	53521
1999-10-01	51416
2000-01-01	53161
2000-04-01	51590
2000-07-01	51503
2000-10-01	54178
2001-01-01	57097
2001-04-01	57509
2001-07-01	60493
2001-10-01	58589
2002-01-01	60616
2002-04-01	72350
2002-07-01	73060
2002-10-01	77590
2003-01-01	80804
2003-04-01	82718
2003-07-01	85951
2003-10-01	94318
2004-01-01	94741
2004-04-01	96593
2004-07-01	100382
2004-10-01	113540
2005-01-01	114361
2005-04-01	113445
2005-07-01	120094
2005-10-01	121799
2006-01-01	129790
2006-04-01	141188
2006-07-01	147933
2006-10-01	158937
2007-01-01	165039
2007-04-01	170731
2007-07-01	186319
2007-10-01	208522
2008-01-01	232023
2008-04-01	248515
2008-07-01	229850
2008-10-01	226006
2009-01-01	228120
2009-04-01	250469
2009-07-01	278212
2009-10-01	279199
2010-01-01	279515
2010-04-01	273837
2010-07-01	302660
2010-10-01	297862
2011-01-01	326297
2011-04-01	333321
2011-07-01	328151
2011-10-01	321169
2012-01-01	355038
2012-04-01	350183
2012-07-01	366574
2012-10-01	369367
2013-01-01	349200
2013-04-01	343799
2013-07-01	350396
2013-10-01	349640
2014-01-01	355528
2014-04-01	352529
2014-07-01	335093
2014-10-01	310846
2015-01-01	292903
2015-04-01	287627
2015-07-01	278555
2015-10-01	272216
2016-01-01	290594
2016-04-01	283118
2016-07-01	293291
2016-10-01	274169
2017-01-01	283530
2017-04-01	283455
2017-07-01	295636
2017-10-01	294977
2018-01-01	298111