Quarter	US dollars
2004-12-31	2310
2005-03-31	2836
2005-06-30	2895
2005-09-30	2989
2005-12-31	2810
2006-03-31	3285
2006-06-30	3645
2006-09-30	4108
2006-12-31	3961
2007-03-31	4136
2007-06-30	4065
2007-09-30	4270
2007-12-31	4000
2008-03-31	4066
2008-06-30	4760
2008-09-30	4304
2008-12-31	4297
2009-03-31	4338
2009-06-30	4817
2009-09-30	5989
2009-12-31	6605
2010-03-31	7400
2010-06-30	7174
2010-09-30	7339
2010-12-31	9831
2011-03-31	10278
2011-06-30	10013
2011-09-30	8459
2011-12-31	9515
2012-03-31	10007
2012-06-30	9255
2012-09-30	8184
2012-12-31	7470
2013-03-31	9043
2013-06-30	7907
2013-09-30	7480
2013-12-31	7062
2014-03-31	8488
2014-06-30	8566
2014-09-30	9050
2014-12-31	8822
2015-03-31	9686
2015-06-30	5551
2015-09-30	4977
2015-12-31	4302
2016-03-31	4378
2016-06-30	3269
2016-09-30	2824
2016-12-31	2178
2017-03-31	2199
2017-06-30	2194
2017-09-30	2231
2017-12-31	2163
2018-03-31	2235
2018-06-30	2090
2018-09-30	4075
2018-12-31	4260
2019-03-31	5508
2019-06-30	5842
2019-09-30	5686
2019-12-31	6161
2020-03-31	6015
2020-06-30	5632
2020-09-30	5736
2020-12-31	5683
2021-03-31	5739
2021-06-30	5688
2021-09-30	6161
2021-12-31	4968
2022-03-31	4728
2022-06-30	4269
2022-09-30	3970
2022-12-31	4001
2023-03-31	4040
2023-06-30	4340
2023-09-30	3628