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	18362
2002-04-01	18457
2002-07-01	18486
2002-10-01	16672
2003-01-01	16789
2003-04-01	16467
2003-07-01	17012
2003-10-01	17572
2004-01-01	18211
2004-04-01	18211
2004-07-01	17783
2004-10-01	17160
2005-01-01	16856
2005-04-01	17404
2005-07-01	18240
2005-10-01	18992
2006-01-01	18366
2006-04-01	18608
2006-07-01	19290
2006-10-01	19702
2007-01-01	20434
2007-04-01	19225
2007-07-01	19764
2007-10-01	20501
2008-01-01	21274
2008-04-01	22708
2008-07-01	23946
2008-10-01	25570
2009-01-01	26208
2009-04-01	25707
2009-07-01	27571
2009-10-01	29570
2010-01-01	30020
2010-04-01	29899
2010-07-01	29629
2010-10-01	31814
2011-01-01	31541
2011-04-01	31638
2011-07-01	33197
2011-10-01	32567
2012-01-01	33343
2012-04-01	32041
2012-07-01	33098
2012-10-01	33193
2013-01-01	33748
2013-04-01	33777
2013-07-01	35897
2013-10-01	37270
2014-01-01	38679
2014-04-01	39529
2014-07-01	39883
2014-10-01	40860
2015-01-01	41869
2015-04-01	42299
2015-07-01	42453
2015-10-01	43154
2016-01-01	43695
2016-04-01	43871
2016-07-01	45505
2016-10-01	46640
2017-01-01	47167
2017-04-01	46671
2017-07-01	48190
2017-10-01	48984
2018-01-01	51086