Quarter	US dollars
2004-12-31	2073
2005-03-31	1456
2005-06-30	1841
2005-09-30	2393
2005-12-31	2225
2006-03-31	4192
2006-06-30	2715
2006-09-30	2804
2006-12-31	2209
2007-03-31	2687
2007-06-30	3591
2007-09-30	2995
2007-12-31	3257
2008-03-31	4281
2008-06-30	4249
2008-09-30	3821
2008-12-31	3194
2009-03-31	4092
2009-06-30	2772
2009-09-30	3835
2009-12-31	2601
2010-03-31	3237
2010-06-30	2333
2010-09-30	2685
2010-12-31	2755
2011-03-31	3491
2011-06-30	5056
2011-09-30	7285
2011-12-31	3780
2012-03-31	4454
2012-06-30	4458
2012-09-30	4055
2012-12-31	4951
2013-03-31	3892
2013-06-30	3831
2013-09-30	4131
2013-12-31	4368
2014-03-31	4737
2014-06-30	3816
2014-09-30	3751
2014-12-31	3799
2015-03-31	3869
2015-06-30	3932
2015-09-30	3999
2015-12-31	3508
2016-03-31	2820
2016-06-30	2872
2016-09-30	3205
2016-12-31	3157
2017-03-31	3981
2017-06-30	5908
2017-09-30	5782
2017-12-31	5386
2018-03-31	4712
2018-06-30	4662
2018-09-30	3959
2018-12-31	5260
2019-03-31	5813
2019-06-30	7568
2019-09-30	6783
2019-12-31	6970
2020-03-31	5368
2020-06-30	4640
2020-09-30	4585
2020-12-31	4738
2021-03-31	3848
2021-06-30	3712
2021-09-30	3573
2021-12-31	3730
2022-03-31	4447
2022-06-30	3216
2022-09-30	3018
2022-12-31	3742
2023-03-31	3721
2023-06-30	4119
2023-09-30	3644