Quarter	US dollars
2004-12-31	2402
2005-03-31	4129
2005-06-30	3757
2005-09-30	3766
2005-12-31	4897
2006-03-31	6308
2006-06-30	5286
2006-09-30	5948
2006-12-31	9763
2007-03-31	10644
2007-06-30	11027
2007-09-30	12878
2007-12-31	11358
2008-03-31	11056
2008-06-30	12607
2008-09-30	10614
2008-12-31	8232
2009-03-31	7237
2009-06-30	7559
2009-09-30	7366
2009-12-31	8444
2010-03-31	1764
2010-06-30	3452
2010-09-30	4214
2010-12-31	3286
2011-03-31	2146
2011-06-30	2797
2011-09-30	2313
2011-12-31	1988
2012-03-31	2285
2012-06-30	2381
2012-09-30	2282
2012-12-31	2297
2013-03-31	3909
2013-06-30	2501
2013-09-30	3318
2013-12-31	2597
2014-03-31	2571
2014-06-30	3556
2014-09-30	3675
2014-12-31	2763
2015-03-31	2583
2015-06-30	2493
2015-09-30	3301
2015-12-31	2848
2016-03-31	2832
2016-06-30	2663
2016-09-30	2536
2016-12-31	2863
2017-03-31	2809
2017-06-30	2672
2017-09-30	2722
2017-12-31	2672
2018-03-31	2996
2018-06-30	3120
2018-09-30	3661
2018-12-31	3397
2019-03-31	3003
2019-06-30	2856
2019-09-30	3374
2019-12-31	3074
2020-03-31	2280
2020-06-30	1618
2020-09-30	1644
2020-12-31	2539
2021-03-31	1973
2021-06-30	2110
2021-09-30	1855
2021-12-31	2283
2022-03-31	1882
2022-06-30	1848
2022-09-30	1887
2022-12-31	2174
2023-03-31	1757
2023-06-30	1939
2023-09-30	1918