Quarter	US dollars
2004-12-31	6933
2005-03-31	6925
2005-06-30	6080
2005-09-30	5894
2005-12-31	5471
2006-03-31	4697
2006-06-30	4788
2006-09-30	5528
2006-12-31	6840
2007-03-31	8124
2007-06-30	5213
2007-09-30	5149
2007-12-31	4752
2008-03-31	5140
2008-06-30	5198
2008-09-30	4256
2008-12-31	4671
2009-03-31	4615
2009-06-30	4865
2009-09-30	5306
2009-12-31	3926
2010-03-31	3843
2010-06-30	4260
2010-09-30	4070
2010-12-31	3566
2011-03-31	4819
2011-06-30	2816
2011-09-30	4376
2011-12-31	4015
2012-03-31	5713
2012-06-30	5167
2012-09-30	6125
2012-12-31	6183
2013-03-31	5623
2013-06-30	5348
2013-09-30	4997
2013-12-31	4119
2014-03-31	4407
2014-06-30	4573
2014-09-30	5188
2014-12-31	5396
2015-03-31	5226
2015-06-30	5287
2015-09-30	5211
2015-12-31	4517
2016-03-31	3928
2016-06-30	3368
2016-09-30	3085
2016-12-31	3735
2017-03-31	3623
2017-06-30	5308
2017-09-30	5248
2017-12-31	6567
2018-03-31	6071
2018-06-30	6125
2018-09-30	6180
2018-12-31	6091
2019-03-31	6528
2019-06-30	6109
2019-09-30	6867
2019-12-31	7107
2020-03-31	6856
2020-06-30	7181
2020-09-30	8817
2020-12-31	8677
2021-03-31	9109
2021-06-30	9206
2021-09-30	8596
2021-12-31	9729
2022-03-31	11159
2022-06-30	11016
2022-09-30	9903
2022-12-31	11148
2023-03-31	12376
2023-06-30	10896
2023-09-30	11350