Quarter	US dollars
2004-12-31	3137
2005-03-31	2675
2005-06-30	2475
2005-09-30	2690
2005-12-31	2922
2006-03-31	3297
2006-06-30	3359
2006-09-30	3419
2006-12-31	3750
2007-03-31	5731
2007-06-30	6009
2007-09-30	7225
2007-12-31	4559
2008-03-31	4859
2008-06-30	5310
2008-09-30	5179
2008-12-31	5890
2009-03-31	6106
2009-06-30	4290
2009-09-30	3998
2009-12-31	3893
2010-03-31	4600
2010-06-30	4559
2010-09-30	4821
2010-12-31	4607
2011-03-31	6896
2011-06-30	6042
2011-09-30	7833
2011-12-31	5786
2012-03-31	5993
2012-06-30	5718
2012-09-30	6489
2012-12-31	5657
2013-03-31	5052
2013-06-30	4444
2013-09-30	3673
2013-12-31	3210
2014-03-31	3141
2014-06-30	3592
2014-09-30	3716
2014-12-31	4136
2015-03-31	3584
2015-06-30	4200
2015-09-30	4924
2015-12-31	4551
2016-03-31	4549
2016-06-30	3890
2016-09-30	3719
2016-12-31	2956
2017-03-31	3179
2017-06-30	3257
2017-09-30	3192
2017-12-31	4139
2018-03-31	4186
2018-06-30	3866
2018-09-30	3850
2018-12-31	4523
2019-03-31	2786
2019-06-30	3617
2019-09-30	4396
2019-12-31	4172
2020-03-31	4363
2020-06-30	4558
2020-09-30	5040
2020-12-31	5091
2021-03-31	4692
2021-06-30	4694
2021-09-30	4006
2021-12-31	3340
2022-03-31	1923
2022-06-30	2731
2022-09-30	3897
2022-12-31	2729
2023-03-31	2433
2023-06-30	2251
2023-09-30	1977