Quarter	Millions of US Dollars
1994-10-01	0
1995-01-01	0
1995-04-01	0
1995-07-01	0
1995-10-01	0
1996-01-01	0
1996-04-01	0
1996-07-01	0
1996-10-01	0
1997-01-01	0
1997-04-01	0
1997-07-01	0
1997-10-01	0
1998-01-01	0
1998-04-01	0
1998-07-01	0
1998-10-01	0
1999-01-01	0
1999-04-01	0
1999-07-01	365
1999-10-01	668
2000-01-01	344
2000-04-01	510
2000-07-01	1494
2000-10-01	1432
2001-01-01	1247
2001-04-01	1400
2001-07-01	2369
2001-10-01	2489
2002-01-01	3061
2002-04-01	3564
2002-07-01	3442
2002-10-01	3106
2003-01-01	1616
2003-04-01	1332
2003-07-01	2753
2003-10-01	3205
2004-01-01	2444
2004-04-01	3006
2004-07-01	4707
2004-10-01	4315
2005-01-01	4761
2005-04-01	3753
2005-07-01	4141
2005-10-01	5090
2006-01-01	6643
2006-04-01	6491
2006-07-01	6919
2006-10-01	6420
2007-01-01	7207
2007-04-01	5039
2007-07-01	4940
2007-10-01	3831
2008-01-01	5209
2008-04-01	4185
2008-07-01	4338
2008-10-01	2335
2009-01-01	6594
2009-04-01	8338
2009-07-01	8399
2009-10-01	6201
2010-01-01	6431
2010-04-01	5770
2010-07-01	5072
2010-10-01	2385
2011-01-01	430
2011-04-01	0
2011-07-01	4036
2011-10-01	0
2012-01-01	1297
2012-04-01	4211
2012-07-01	6382
2012-10-01	1889
2013-01-01	684
2013-04-01	0
2013-07-01	3264
2013-10-01	2442
2014-01-01	2806
2014-04-01	3260
2014-07-01	3587
2014-10-01	2951
2015-01-01	4179
2015-04-01	2664
2015-07-01	2762
2015-10-01	5207
2016-01-01	4016
2016-04-01	3721
2016-07-01	5069
2016-10-01	1557
2017-01-01	4109
2017-04-01	3851
2017-07-01	5274
2017-10-01	4084
2018-01-01	3753