Quarter	US dollars
2004-12-31	922
2005-03-31	1618
2005-06-30	1522
2005-09-30	6637
2005-12-31	7047
2006-03-31	6749
2006-06-30	6922
2006-09-30	7931
2006-12-31	7131
2007-03-31	7751
2007-06-30	8347
2007-09-30	8655
2007-12-31	8925
2008-03-31	9627
2008-06-30	9525
2008-09-30	8588
2008-12-31	8679
2009-03-31	8897
2009-06-30	8596
2009-09-30	8879
2009-12-31	8710
2010-03-31	9096
2010-06-30	9407
2010-09-30	10181
2010-12-31	10580
2011-03-31	6630
2011-06-30	7750
2011-09-30	7132
2011-12-31	6764
2012-03-31	7193
2012-06-30	7258
2012-09-30	7123
2012-12-31	8045
2013-03-31	7648
2013-06-30	7823
2013-09-30	7221
2013-12-31	5851
2014-03-31	6973
2014-06-30	6285
2014-09-30	6029
2014-12-31	5500
2015-03-31	5418
2015-06-30	5686
2015-09-30	5191
2015-12-31	5412
2016-03-31	5944
2016-06-30	5693
2016-09-30	6427
2016-12-31	6962
2017-03-31	6260
2017-06-30	5738
2017-09-30	6035
2017-12-31	4946
2018-03-31	5043
2018-06-30	5360
2018-09-30	5574
2018-12-31	5948
2019-03-31	5192
2019-06-30	4993
2019-09-30	4970
2019-12-31	5396
2020-03-31	4609
2020-06-30	4441
2020-09-30	4251
2020-12-31	4411
2021-03-31	4302
2021-06-30	4777
2021-09-30	4601
2021-12-31	4303
2022-03-31	4088
2022-06-30	4128
2022-09-30	4745
2022-12-31	4003
2023-03-31	4099
2023-06-30	3645
2023-09-30	3273