Quarter	US dollars
2004-12-31	2070
2005-03-31	2531
2005-06-30	2110
2005-09-30	2057
2005-12-31	1905
2006-03-31	2090
2006-06-30	2171
2006-09-30	2208
2006-12-31	1699
2007-03-31	1704
2007-06-30	2560
2007-09-30	2899
2007-12-31	3048
2008-03-31	3490
2008-06-30	3278
2008-09-30	2659
2008-12-31	2363
2009-03-31	1446
2009-06-30	1410
2009-09-30	1412
2009-12-31	1910
2010-03-31	1863
2010-06-30	2319
2010-09-30	3257
2010-12-31	2520
2011-03-31	2459
2011-06-30	2368
2011-09-30	1972
2011-12-31	2250
2012-03-31	1229
2012-06-30	1079
2012-09-30	1828
2012-12-31	1940
2013-03-31	1966
2013-06-30	1900
2013-09-30	2123
2013-12-31	2251
2014-03-31	2668
2014-06-30	2641
2014-09-30	2537
2014-12-31	2511
2015-03-31	2022
2015-06-30	2075
2015-09-30	1383
2015-12-31	1648
2016-03-31	1724
2016-06-30	1903
2016-09-30	2215
2016-12-31	1841
2017-03-31	1971
2017-06-30	1885
2017-09-30	2000
2017-12-31	2089
2018-03-31	2735
2018-06-30	1839
2018-09-30	1857
2018-12-31	2343
2019-03-31	2986
2019-06-30	2443
2019-09-30	2388
2019-12-31	3132
2020-03-31	2405
2020-06-30	2424
2020-09-30	2456
2020-12-31	2754
2021-03-31	2747
2021-06-30	2688
2021-09-30	3047
2021-12-31	2470
2022-03-31	2561
2022-06-30	2564
2022-09-30	1744
2022-12-31	2493
2023-03-31	2744
2023-06-30	2413
2023-09-30	2306