Quarter	US dollars
2004-12-31	2050
2005-03-31	1520
2005-06-30	1425
2005-09-30	1457
2005-12-31	1677
2006-03-31	1571
2006-06-30	1768
2006-09-30	1930
2006-12-31	2172
2007-03-31	2038
2007-06-30	2157
2007-09-30	2223
2007-12-31	2288
2008-03-31	2415
2008-06-30	2326
2008-09-30	2413
2008-12-31	2392
2009-03-31	2367
2009-06-30	2543
2009-09-30	2465
2009-12-31	2299
2010-03-31	2152
2010-06-30	2035
2010-09-30	2110
2010-12-31	2272
2011-03-31	3262
2011-06-30	1288
2011-09-30	2835
2011-12-31	2429
2012-03-31	2389
2012-06-30	2689
2012-09-30	2742
2012-12-31	2645
2013-03-31	2569
2013-06-30	2445
2013-09-30	2531
2013-12-31	1764
2014-03-31	1902
2014-06-30	1809
2014-09-30	1845
2014-12-31	1661
2015-03-31	1557
2015-06-30	1579
2015-09-30	1495
2015-12-31	1393
2016-03-31	1419
2016-06-30	1299
2016-09-30	1304
2016-12-31	1246
2017-03-31	1267
2017-06-30	1164
2017-09-30	1618
2017-12-31	1668
2018-03-31	1908
2018-06-30	2200
2018-09-30	2463
2018-12-31	2348
2019-03-31	1994
2019-06-30	2225
2019-09-30	2395
2019-12-31	2931
2020-03-31	3174
2020-06-30	3389
2020-09-30	3541
2020-12-31	3504
2021-03-31	3419
2021-06-30	3347
2021-09-30	2844
2021-12-31	2860
2022-03-31	3767
2022-06-30	3647
2022-09-30	3333
2022-12-31	4431
2023-03-31	4870
2023-06-30	4182
2023-09-30	4770