Quarter	US dollars
2004-12-31	-1085
2005-03-31	-864
2005-06-30	-1061
2005-09-30	-1091
2005-12-31	-1066
2006-03-31	-1094
2006-06-30	-1043
2006-09-30	-968
2006-12-31	-945
2007-03-31	-973
2007-06-30	-999
2007-09-30	-1145
2007-12-31	-1079
2008-03-31	-1988
2008-06-30	-1835
2008-09-30	-1689
2008-12-31	-1384
2009-03-31	-1531
2009-06-30	-1553
2009-09-30	-1655
2009-12-31	-1755
2010-03-31	-1772
2010-06-30	-2090
2010-09-30	-2162
2010-12-31	-2304
2011-03-31	-1581
2011-06-30	-1156
2011-09-30	-1203
2011-12-31	-1084
2012-03-31	-1133
2012-06-30	-993
2012-09-30	-575
2012-12-31	-718
2013-03-31	-1456
2013-06-30	-1262
2013-09-30	-1755
2013-12-31	-1673
2014-03-31	-1599
2014-06-30	-1792
2014-09-30	-2099
2014-12-31	-1967
2015-03-31	-1952
2015-06-30	-1323
2015-09-30	-1224
2015-12-31	-1187
2016-03-31	-983
2016-06-30	-1085
2016-09-30	-1430
2016-12-31	-1416
2017-03-31	-1044
2017-06-30	-1733
2017-09-30	-2067
2017-12-31	-1822
2018-03-31	-2025
2018-06-30	-2226
2018-09-30	-1961
2018-12-31	-1808
2019-03-31	-1577
2019-06-30	-2031
2019-09-30	-1830
2019-12-31	-1773
2020-03-31	-1817
2020-06-30	-1807
2020-09-30	-1813
2020-12-31	-1825
2021-03-31	-1842
2021-06-30	-1805
2021-09-30	-1913
2021-12-31	-1908
2022-03-31	-2068
2022-06-30	-2138
2022-09-30	-1902
2022-12-31	-1602
2023-03-31	-1982
2023-06-30	-1935
2023-09-30	-2095