Quarter	US dollars
2004-12-31	8019
2005-03-31	4906
2005-06-30	5326
2005-09-30	4737
2005-12-31	5785
2006-03-31	6584
2006-06-30	6355
2006-09-30	6148
2006-12-31	8429
2007-03-31	9834
2007-06-30	8098
2007-09-30	10315
2007-12-31	10689
2008-03-31	12042
2008-06-30	10661
2008-09-30	9491
2008-12-31	8015
2009-03-31	8376
2009-06-30	8489
2009-09-30	10124
2009-12-31	8526
2010-03-31	10835
2010-06-30	9410
2010-09-30	10156
2010-12-31	10138
2011-03-31	10035
2011-06-30	8370
2011-09-30	9173
2011-12-31	7019
2012-03-31	6955
2012-06-30	6160
2012-09-30	6366
2012-12-31	6986
2013-03-31	6422
2013-06-30	8395
2013-09-30	7099
2013-12-31	7502
2014-03-31	7256
2014-06-30	7810
2014-09-30	7271
2014-12-31	5236
2015-03-31	6108
2015-06-30	5524
2015-09-30	5177
2015-12-31	3986
2016-03-31	4441
2016-06-30	5283
2016-09-30	5169
2016-12-31	4898
2017-03-31	4614
2017-06-30	4880
2017-09-30	4336
2017-12-31	5450
2018-03-31	6896
2018-06-30	4758
2018-09-30	5143
2018-12-31	3969
2019-03-31	6350
2019-06-30	6425
2019-09-30	7443
2019-12-31	6791
2020-03-31	7060
2020-06-30	7318
2020-09-30	8203
2020-12-31	9111
2021-03-31	6915
2021-06-30	7095
2021-09-30	7818
2021-12-31	7393
2022-03-31	6507
2022-06-30	6556
2022-09-30	5145
2022-12-31	5087
2023-03-31	5851
2023-06-30	6736
2023-09-30	6430