Quarter	US dollars
2004-12-31	1079
2005-03-31	1405
2005-06-30	1644
2005-09-30	1838
2005-12-31	1650
2006-03-31	2095
2006-06-30	2354
2006-09-30	3056
2006-12-31	2869
2007-03-31	2856
2007-06-30	3704
2007-09-30	3963
2007-12-31	4229
2008-03-31	4146
2008-06-30	4575
2008-09-30	3764
2008-12-31	3755
2009-03-31	2261
2009-06-30	3221
2009-09-30	3478
2009-12-31	3218
2010-03-31	3117
2010-06-30	2980
2010-09-30	3710
2010-12-31	5697
2011-03-31	5462
2011-06-30	5324
2011-09-30	5451
2011-12-31	5084
2012-03-31	3925
2012-06-30	5964
2012-09-30	6650
2012-12-31	11313
2013-03-31	21341
2013-06-30	22936
2013-09-30	21240
2013-12-31	19572
2014-03-31	18650
2014-06-30	14011
2014-09-30	13164
2014-12-31	11772
2015-03-31	11936
2015-06-30	13555
2015-09-30	13504
2015-12-31	12881
2016-03-31	14139
2016-06-30	13906
2016-09-30	13435
2016-12-31	12237
2017-03-31	12002
2017-06-30	12594
2017-09-30	13392
2017-12-31	13357
2018-03-31	14120
2018-06-30	14385
2018-09-30	10874
2018-12-31	14208
2019-03-31	15331
2019-06-30	16633
2019-09-30	18065
2019-12-31	18390
2020-03-31	20614
2020-06-30	19674
2020-09-30	19648
2020-12-31	17360
2021-03-31	17891
2021-06-30	15516
2021-09-30	15797
2021-12-31	14938
2022-03-31	15573
2022-06-30	15518
2022-09-30	15800
2022-12-31	14212
2023-03-31	14470
2023-06-30	13073
2023-09-30	13189