Quarter	US dollars
2004-12-31	3344
2005-03-31	1412
2005-06-30	1441
2005-09-30	2354
2005-12-31	1569
2006-03-31	1379
2006-06-30	1578
2006-09-30	2253
2006-12-31	1618
2007-03-31	1359
2007-06-30	2075
2007-09-30	1917
2007-12-31	1997
2008-03-31	1962
2008-06-30	1897
2008-09-30	1547
2008-12-31	1941
2009-03-31	2074
2009-06-30	2429
2009-09-30	2693
2009-12-31	2693
2010-03-31	2542
2010-06-30	2506
2010-09-30	2973
2010-12-31	2971
2011-03-31	3036
2011-06-30	2938
2011-09-30	2583
2011-12-31	2554
2012-03-31	2904
2012-06-30	2943
2012-09-30	3030
2012-12-31	2878
2013-03-31	2553
2013-06-30	2666
2013-09-30	2539
2013-12-31	2368
2014-03-31	3781
2014-06-30	3630
2014-09-30	3610
2014-12-31	3410
2015-03-31	3626
2015-06-30	3552
2015-09-30	3241
2015-12-31	3288
2016-03-31	3428
2016-06-30	3498
2016-09-30	3484
2016-12-31	5760
2017-03-31	6090
2017-06-30	5940
2017-09-30	6045
2017-12-31	6477
2018-03-31	6424
2018-06-30	6315
2018-09-30	6584
2018-12-31	6613
2019-03-31	5976
2019-06-30	6370
2019-09-30	2347
2019-12-31	2657
2020-03-31	2275
2020-06-30	1864
2020-09-30	1639
2020-12-31	1701
2021-03-31	1564
2021-06-30	1549
2021-09-30	2437
2021-12-31	2573
2022-03-31	2081
2022-06-30	2127
2022-09-30	2106
2022-12-31	2091
2023-03-31	2148
2023-06-30	2135
2023-09-30	2036