Quarter	US dollars
2004-12-31	2968
2005-03-31	2898
2005-06-30	1970
2005-09-30	3690
2005-12-31	3347
2006-03-31	3856
2006-06-30	2835
2006-09-30	2427
2006-12-31	4613
2007-03-31	5260
2007-06-30	5528
2007-09-30	5961
2007-12-31	6466
2008-03-31	8948
2008-06-30	10205
2008-09-30	11888
2008-12-31	10125
2009-03-31	9853
2009-06-30	9624
2009-09-30	10096
2009-12-31	11207
2010-03-31	11839
2010-06-30	15448
2010-09-30	16587
2010-12-31	16179
2011-03-31	17397
2011-06-30	15773
2011-09-30	16266
2011-12-31	16587
2012-03-31	14770
2012-06-30	16008
2012-09-30	16520
2012-12-31	18089
2013-03-31	19887
2013-06-30	19772
2013-09-30	18758
2013-12-31	16830
2014-03-31	15141
2014-06-30	15423
2014-09-30	15617
2014-12-31	13069
2015-03-31	12320
2015-06-30	11919
2015-09-30	9225
2015-12-31	8300
2016-03-31	9855
2016-06-30	10005
2016-09-30	10547
2016-12-31	11569
2017-03-31	9050
2017-06-30	11759
2017-09-30	13325
2017-12-31	13636
2018-03-31	13467
2018-06-30	15170
2018-09-30	15457
2018-12-31	13644
2019-03-31	13766
2019-06-30	13256
2019-09-30	11704
2019-12-31	8029
2020-03-31	8538
2020-06-30	7925
2020-09-30	7757
2020-12-31	9051
2021-03-31	11862
2021-06-30	13044
2021-09-30	11952
2021-12-31	18896
2022-03-31	16672
2022-06-30	15760
2022-09-30	15980
2022-12-31	17632
2023-03-31	15021
2023-06-30	14572
2023-09-30	16358