Quarter	Millions of US Dollars
1995-04-01	882
1995-07-01	2190
1995-10-01	2185
1996-01-01	1135
1996-04-01	786
1996-07-01	1682
1996-10-01	1866
1997-01-01	2179
1997-04-01	1118
1997-07-01	1192
1997-10-01	-985
1998-01-01	-593
1998-04-01	237
1998-07-01	1590
1998-10-01	1583
1999-01-01	-200
1999-04-01	675
1999-07-01	714
1999-10-01	924
2000-01-01	838
2000-04-01	-72
2000-07-01	-283
2000-10-01	69
2001-01-01	978
2001-04-01	1469
2001-07-01	602
2001-10-01	2472
2002-01-01	1468
2002-04-01	-671
2002-07-01	528
2002-10-01	2072
2003-01-01	2392
2003-04-01	3322
2003-07-01	112
2003-10-01	2162
2004-01-01	825
2004-04-01	434
2004-07-01	1402
2004-10-01	1906
2005-01-01	962
2005-04-01	328
2005-07-01	1836
2005-10-01	-1222
2006-01-01	1820
2006-04-01	-3634
2006-07-01	1048
2006-10-01	1627
2007-01-01	925
2007-04-01	-3662
2007-07-01	2751
2007-10-01	2321
2008-01-01	751
2008-04-01	4393
2008-07-01	2576
2008-10-01	4498
2009-01-01	4010
2009-04-01	2597
2009-07-01	5001
2009-10-01	1310
2010-01-01	508
2010-04-01	424
2010-07-01	2516
2010-10-01	2412
2011-01-01	-1423
2011-04-01	-1149
2011-07-01	3668
2011-10-01	3982
2012-01-01	636
2012-04-01	2315
2012-07-01	4006
2012-10-01	6311
2013-01-01	-327
2013-04-01	3464
2013-07-01	930
2013-10-01	1892
2014-01-01	1440
2014-04-01	3421
2014-07-01	125
2014-10-01	-441
2015-01-01	3857
2015-04-01	-5298
2015-07-01	1637
2015-10-01	1216
2016-01-01	2425
2016-04-01	1339
2016-07-01	-2436
2016-10-01	-2395
2017-01-01	-1993
2017-04-01	1960
2017-07-01	426
2017-10-01	-2267
2018-01-01	-496