Quarter	US dollars
2004-12-31	-6691
2005-03-31	-6414
2005-06-30	-7263
2005-09-30	-8695
2005-12-31	-8796
2006-03-31	-9032
2006-06-30	-8182
2006-09-30	-8269
2006-12-31	-11241
2007-03-31	-13700
2007-06-30	-15403
2007-09-30	-15598
2007-12-31	-13178
2008-03-31	-13493
2008-06-30	-12500
2008-09-30	-10005
2008-12-31	-5647
2009-03-31	-7325
2009-06-30	-5910
2009-09-30	-6127
2009-12-31	-5789
2010-03-31	-6259
2010-06-30	-8757
2010-09-30	-8104
2010-12-31	-8330
2011-03-31	-7890
2011-06-30	-5990
2011-09-30	-6364
2011-12-31	-6979
2012-03-31	-7850
2012-06-30	-6560
2012-09-30	-6741
2012-12-31	-3833
2013-03-31	-4281
2013-06-30	-4383
2013-09-30	-2400
2013-12-31	-3094
2014-03-31	-3013
2014-06-30	-1869
2014-09-30	-1704
2014-12-31	-2533
2015-03-31	-2236
2015-06-30	-3374
2015-09-30	-3537
2015-12-31	-2410
2016-03-31	-1536
2016-06-30	-1595
2016-09-30	-815
2016-12-31	-3939
2017-03-31	-4065
2017-06-30	-2911
2017-09-30	-3394
2017-12-31	-1751
2018-03-31	100
2018-06-30	255
2018-09-30	1029
2018-12-31	-530
2019-03-31	308
2019-06-30	886
2019-09-30	1363
2019-12-31	1114
2020-03-31	-786
2020-06-30	114
2020-09-30	-662
2020-12-31	-1987
2021-03-31	-1489
2021-06-30	-2306
2021-09-30	-971
2021-12-31	-946
2022-03-31	-1626
2022-06-30	-643
2022-09-30	-181
2022-12-31	-554
2023-03-31	-116
2023-06-30	-978
2023-09-30	-871