Quarter	US dollars
1999-03-31	944
1999-06-30	1319
1999-09-30	553
1999-12-31	630
2000-03-31	668
2000-06-30	267
2000-09-30	654
2000-12-31	-239
2001-03-31	-89
2001-06-30	424
2001-09-30	250
2001-12-31	239
2002-03-31	-373
2002-06-30	24
2002-09-30	-431
2002-12-31	-811
2003-03-31	-1636
2003-06-30	-1200
2003-09-30	-691
2003-12-31	-468
2004-03-31	407
2004-06-30	375
2004-09-30	233
2004-12-31	300
2005-03-31	419
2005-06-30	384
2005-09-30	686
2005-12-31	284
2006-03-31	286
2006-06-30	266
2006-09-30	-227
2006-12-31	937
2007-03-31	839
2007-06-30	1432
2007-09-30	707
2007-12-31	8450
2008-03-31	10896
2008-06-30	9669
2008-09-30	7050
2008-12-31	5908
2009-03-31	7062
2009-06-30	8006
2009-09-30	7765
2009-12-31	6633
2010-03-31	10205
2010-06-30	8366
2010-09-30	8962
2010-12-31	9778
2011-03-31	11113
2011-06-30	9613
2011-09-30	9726
2011-12-31	8843
2012-03-31	10435
2012-06-30	9373
2012-09-30	9210
2012-12-31	9092
2013-03-31	7584
2013-06-30	7349
2013-09-30	7980
2013-12-31	9145
2014-03-31	9052
2014-06-30	9665
2014-09-30	7996
2014-12-31	7372
2015-03-31	6652
2015-06-30	6178
2015-09-30	7520
2015-12-31	7466
2016-03-31	7994
2016-06-30	9657