Quarter	US dollars
2004-12-31	2333
2005-03-31	3730
2005-06-30	2669
2005-09-30	2704
2005-12-31	2293
2006-03-31	3296
2006-06-30	3434
2006-09-30	3144
2006-12-31	2388
2007-03-31	5001
2007-06-30	2751
2007-09-30	2691
2007-12-31	1356
2008-03-31	1671
2008-06-30	1905
2008-09-30	1930
2008-12-31	1636
2009-03-31	957
2009-06-30	1352
2009-09-30	261
2009-12-31	-412
2010-03-31	1053
2010-06-30	2056
2010-09-30	2670
2010-12-31	1008
2011-03-31	1209
2011-06-30	1704
2011-09-30	3086
2011-12-31	1855
2012-03-31	2766
2012-06-30	3934
2012-09-30	3149
2012-12-31	3156
2013-03-31	3648
2013-06-30	3132
2013-09-30	4021
2013-12-31	3464
2014-03-31	3655
2014-06-30	4146
2014-09-30	2844
2014-12-31	2710
2015-03-31	2136
2015-06-30	2787
2015-09-30	1863
2015-12-31	2512
2016-03-31	2345
2016-06-30	2312
2016-09-30	2146
2016-12-31	1414
2017-03-31	708
2017-06-30	1079
2017-09-30	3134
2017-12-31	1389
2018-03-31	1858
2018-06-30	920
2018-09-30	929
2018-12-31	1328
2019-03-31	1277
2019-06-30	2211
2019-09-30	2232
2019-12-31	1637
2020-03-31	2050
2020-06-30	1827
2020-09-30	1237
2020-12-31	1844
2021-03-31	3250
2021-06-30	3019
2021-09-30	3429
2021-12-31	2854
2022-03-31	3822
2022-06-30	3711
2022-09-30	2724
2022-12-31	1905
2023-03-31	3039
2023-06-30	1941
2023-09-30	2527