Quarter	US dollars
2004-12-31	3711
2005-03-31	1892
2005-06-30	4221
2005-09-30	4657
2005-12-31	4271
2006-03-31	5438
2006-06-30	5223
2006-09-30	4923
2006-12-31	5744
2007-03-31	6292
2007-06-30	5608
2007-09-30	7235
2007-12-31	7780
2008-03-31	8117
2008-06-30	9620
2008-09-30	9260
2008-12-31	6238
2009-03-31	5464
2009-06-30	4833
2009-09-30	6906
2009-12-31	11438
2010-03-31	11823
2010-06-30	11163
2010-09-30	10266
2010-12-31	10040
2011-03-31	10394
2011-06-30	10621
2011-09-30	9908
2011-12-31	13162
2012-03-31	14186
2012-06-30	12605
2012-09-30	11214
2012-12-31	12668
2013-03-31	11468
2013-06-30	10838
2013-09-30	11734
2013-12-31	9831
2014-03-31	10099
2014-06-30	10166
2014-09-30	11767
2014-12-31	10153
2015-03-31	10182
2015-06-30	10814
2015-09-30	10853
2015-12-31	9543
2016-03-31	10722
2016-06-30	8776
2016-09-30	7393
2016-12-31	7905
2017-03-31	8496
2017-06-30	8289
2017-09-30	6865
2017-12-31	7938
2018-03-31	11224
2018-06-30	11241
2018-09-30	6737
2018-12-31	8597
2019-03-31	10812
2019-06-30	10073
2019-09-30	9138
2019-12-31	13952
2020-03-31	15669
2020-06-30	12520
2020-09-30	11192
2020-12-31	11441
2021-03-31	12528
2021-06-30	11395
2021-09-30	10886
2021-12-31	10344
2022-03-31	15336
2022-06-30	17832
2022-09-30	13020
2022-12-31	9217
2023-03-31	13742
2023-06-30	15218
2023-09-30	14508