Quarter	US dollars
2004-12-31	2440
2005-03-31	2660
2005-06-30	2554
2005-09-30	2524
2005-12-31	2202
2006-03-31	2158
2006-06-30	2286
2006-09-30	2165
2006-12-31	2053
2007-03-31	3162
2007-06-30	2819
2007-09-30	2626
2007-12-31	2923
2008-03-31	2123
2008-06-30	2523
2008-09-30	2238
2008-12-31	1906
2009-03-31	2379
2009-06-30	2473
2009-09-30	2584
2009-12-31	5817
2010-03-31	6134
2010-06-30	6823
2010-09-30	7786
2010-12-31	7662
2011-03-31	7997
2011-06-30	8182
2011-09-30	7247
2011-12-31	5912
2012-03-31	5095
2012-06-30	5158
2012-09-30	5806
2012-12-31	4884
2013-03-31	5037
2013-06-30	5669
2013-09-30	5538
2013-12-31	5352
2014-03-31	2634
2014-06-30	2667
2014-09-30	3032
2014-12-31	2574
2015-03-31	2445
2015-06-30	2353
2015-09-30	2449
2015-12-31	2252
2016-03-31	2293
2016-06-30	2547
2016-09-30	2258
2016-12-31	2125
2017-03-31	2204
2017-06-30	2267
2017-09-30	2328
2017-12-31	1529
2018-03-31	1834
2018-06-30	1973
2018-09-30	1647
2018-12-31	1553
2019-03-31	1449
2019-06-30	1260
2019-09-30	1781
2019-12-31	1719
2020-03-31	1854
2020-06-30	1814
2020-09-30	1590
2020-12-31	1687
2021-03-31	2206
2021-06-30	1465
2021-09-30	1436
2021-12-31	1786
2022-03-31	890
2022-06-30	927
2022-09-30	795
2022-12-31	769
2023-03-31	837
2023-06-30	830
2023-09-30	718