Quarter	US dollars
1999-09-30	0
1999-12-31	0
2000-03-31	0
2000-06-30	0
2000-09-30	0
2000-12-31	0
2001-03-31	-446
2001-06-30	-863
2001-09-30	-1430
2001-12-31	-1878
2002-03-31	-3054
2002-06-30	-4026
2002-09-30	-4136
2002-12-31	-4454
2003-03-31	-6691
2003-06-30	-7122
2003-09-30	-7251
2003-12-31	-7889
2004-03-31	-7503
2004-06-30	-7413
2004-09-30	-7639
2004-12-31	-8444
2005-03-31	-7847
2005-06-30	-7405
2005-09-30	-7388
2005-12-31	-7235
2006-03-31	-8428
2006-06-30	-8944
2006-09-30	-8940
2006-12-31	-9348
2007-03-31	-8578
2007-06-30	-8712
2007-09-30	-9215
2007-12-31	-9609
2008-03-31	-8839
2008-06-30	-8790
2008-09-30	-8391
2008-12-31	-8514
2009-03-31	-6126
2009-06-30	-6169
2009-09-30	-6223
2009-12-31	-6240
2010-03-31	-6079
2010-06-30	-6117
2010-09-30	-6181
2010-12-31	-6180
2011-03-31	-6071
2011-06-30	-6118
2011-09-30	-6131
2011-12-31	-6137
2012-03-31	-6063
2012-06-30	-6077
2012-09-30	-6076
2012-12-31	-6077
2013-03-31	-6031
2013-06-30	-6023
2013-09-30	-6017
2013-12-31	-6020
2014-03-31	-6004
2014-06-30	-6022
2014-09-30	-6003
2014-12-31	-6012
2015-03-31	-6028
2015-06-30	-6035
2015-09-30	-6028
2015-12-31	-6013
2016-03-31	-6029
2016-06-30	-6059
2016-09-30	-6025
2016-12-31	-6002
2017-03-31	-5993
2017-06-30	-6018
2017-09-30	-5995
2017-12-31	-5993
2018-03-31	-5956
2018-06-30	-5975
2018-09-30	-5943
2018-12-31	-6006
2019-03-31	-6016
2019-06-30	-6098
2019-09-30	-6069
2019-12-31	-6097
2020-03-31	-4122
2020-06-30	-6148
2020-09-30	-6107
2020-12-31	-6109
2021-03-31	-6052
2021-06-30	-6047
2021-09-30	-6025
2021-12-31	-6001
2022-03-31	-5867
2022-06-30	-5831
2022-09-30	-5746
2022-12-31	-5783
2023-03-31	-7878
2023-06-30	-5867
2023-09-30	-5850
2023-12-31	-5973