Quarter	US dollars
2004-12-31	-1517
2005-03-31	-1147
2005-06-30	-1104
2005-09-30	-674
2005-12-31	-863
2006-03-31	-687
2006-06-30	-512
2006-09-30	-887
2006-12-31	-734
2007-03-31	-1134
2007-06-30	-1316
2007-09-30	-1569
2007-12-31	-3337
2008-03-31	-5817
2008-06-30	-4078
2008-09-30	-4625
2008-12-31	-6452
2009-03-31	-4931
2009-06-30	-3047
2009-09-30	-2909
2009-12-31	-2316
2010-03-31	-2516
2010-06-30	-2672
2010-09-30	-2478
2010-12-31	-2546
2011-03-31	-1675
2011-06-30	-1320
2011-09-30	-1846
2011-12-31	-1982
2012-03-31	-1897
2012-06-30	-1693
2012-09-30	-1864
2012-12-31	-1958
2013-03-31	-1158
2013-06-30	-1027
2013-09-30	1090
2013-12-31	-1585
2014-03-31	-1074
2014-06-30	-2260
2014-09-30	-2121
2014-12-31	-2132
2015-03-31	-2096
2015-06-30	-1707
2015-09-30	-1813
2015-12-31	-2153
2016-03-31	-2473
2016-06-30	-3697
2016-09-30	-2651
2016-12-31	-5171
2017-03-31	-2136
2017-06-30	-2062
2017-09-30	-2274
2017-12-31	-1327
2018-03-31	-2004
2018-06-30	-1390
2018-09-30	-2023
2018-12-31	-2275
2019-03-31	-1987
2019-06-30	-1600
2019-09-30	-2225
2019-12-31	-1440
2020-03-31	-1295
2020-06-30	-2624
2020-09-30	-2536
2020-12-31	-3456
2021-03-31	-2388
2021-06-30	-2154
2021-09-30	-1752
2021-12-31	-1338
2022-03-31	-1903
2022-06-30	-2574
2022-09-30	-3573
2022-12-31	-3032
2023-03-31	-1886
2023-06-30	-2562
2023-09-30	-3044