Quarter	Millions of US Dollars
1995-01-01	4992
1995-04-01	4942
1995-07-01	4638
1995-10-01	5183
1996-01-01	4628
1996-04-01	5353
1996-07-01	5021
1996-10-01	7853
1997-01-01	8683
1997-04-01	7073
1997-07-01	5149
1997-10-01	1513
1998-01-01	2033
1998-04-01	3222
1998-07-01	4554
1998-10-01	5329
1999-01-01	5652
1999-04-01	9584
1999-07-01	8714
1999-10-01	8981
2000-01-01	11628
2000-04-01	9090
2000-07-01	8928
2000-10-01	6158
2001-01-01	6625
2001-04-01	6822
2001-07-01	7323
2001-10-01	5324
2002-01-01	10198
2002-04-01	11772
2002-07-01	10871
2002-10-01	8675
2003-01-01	13475
2003-04-01	14931
2003-07-01	15866
2003-10-01	12700
2004-01-01	16391
2004-04-01	12422
2004-07-01	6863
2004-10-01	11176
2005-01-01	13478
2005-04-01	10313
2005-07-01	4034
2005-10-01	7592
2006-01-01	14760
2006-04-01	18103
2006-07-01	19563
2006-10-01	23323
2007-01-01	26704
2007-04-01	28556
2007-07-01	29104
2007-10-01	26396
2008-01-01	49963
2008-04-01	39252
2008-07-01	28194
2008-10-01	35317
2009-01-01	41833
2009-04-01	48322
2009-07-01	48732
2009-10-01	58556
2010-01-01	70487
2010-04-01	64507
2010-07-01	62041
2010-10-01	51336
2011-01-01	60671
2011-04-01	52671
2011-07-01	41760
2011-10-01	34108
2012-01-01	21694
2012-04-01	21627
2012-07-01	18771
2012-10-01	21754
2013-01-01	23259
2013-04-01	22283
2013-07-01	18217
2013-10-01	19499
2014-01-01	22159
2014-04-01	23424
2014-07-01	22546
2014-10-01	29973
2015-01-01	30213
2015-04-01	24241
2015-07-01	26506
2015-10-01	25213
2016-01-01	34903
2016-04-01	36333
2016-07-01	40597
2016-10-01	37781
2017-01-01	43575
2017-04-01	44249
2017-07-01	43575
2017-10-01	46613
2018-01-01	50140