Quarter	Millions of US Dollars
1993-10-01	3354
1994-01-01	4370
1994-04-01	4858
1994-07-01	5540
1994-10-01	5626
1995-01-01	5565
1995-04-01	5808
1995-07-01	5926
1995-10-01	7417
1996-01-01	7984
1996-04-01	8562
1996-07-01	9633
1996-10-01	10968
1997-01-01	12027
1997-04-01	12862
1997-07-01	12721
1997-10-01	12821
1998-01-01	13251
1998-04-01	13417
1998-07-01	13293
1998-10-01	14215
1999-01-01	14548
1999-04-01	14755
1999-07-01	15794
1999-10-01	16659
2000-01-01	17010
2000-04-01	17256
2000-07-01	17495
2000-10-01	17887
2001-01-01	18221
2001-04-01	18309
2001-07-01	18068
2001-10-01	18602
2002-01-01	18416
2002-04-01	18546
2002-07-01	18653
2002-10-01	16858
2003-01-01	16988
2003-04-01	16670
2003-07-01	17236
2003-10-01	17785
2004-01-01	18388
2004-04-01	18394
2004-07-01	17996
2004-10-01	17337
2005-01-01	17023
2005-04-01	17569
2005-07-01	18404
2005-10-01	19149
2006-01-01	18521
2006-04-01	18755
2006-07-01	19429
2006-10-01	19830
2007-01-01	20573
2007-04-01	19373
2007-07-01	19927
2007-10-01	20649
2008-01-01	21389
2008-04-01	22815
2008-07-01	24082
2008-10-01	25712
2009-01-01	26379
2009-04-01	25868
2009-07-01	27684
2009-10-01	29674
2010-01-01	30102
2010-04-01	29982
2010-07-01	29713
2010-10-01	31898
2011-01-01	31663
2011-04-01	31760
2011-07-01	33323
2011-10-01	32687
2012-01-01	33424
2012-04-01	32115
2012-07-01	33152
2012-10-01	33248
2013-01-01	33801
2013-04-01	33823
2013-07-01	35943
2013-10-01	37302
2014-01-01	38693
2014-04-01	39543
2014-07-01	39897
2014-10-01	40873
2015-01-01	41882
2015-04-01	42313
2015-07-01	42467
2015-10-01	43169
2016-01-01	43710
2016-04-01	43886
2016-07-01	45521
2016-10-01	46656
2017-01-01	47184
2017-04-01	46688
2017-07-01	48208
2017-10-01	49001
2018-01-01	51103