Quarter	US dollars
2004-12-31	2310
2005-03-31	2836
2005-06-30	2897
2005-09-30	2989
2005-12-31	2812
2006-03-31	3285
2006-06-30	3645
2006-09-30	4108
2006-12-31	3963
2007-03-31	4138
2007-06-30	4071
2007-09-30	4295
2007-12-31	4026
2008-03-31	4100
2008-06-30	4782
2008-09-30	4306
2008-12-31	4298
2009-03-31	4339
2009-06-30	4817
2009-09-30	5989
2009-12-31	6608
2010-03-31	7541
2010-06-30	7313
2010-09-30	7479
2010-12-31	9972
2011-03-31	10424
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	5552
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	2195
2017-09-30	2236
2017-12-31	2163
2018-03-31	2249
2018-06-30	2091
2018-09-30	4075
2018-12-31	4260
2019-03-31	5521
2019-06-30	5861
2019-09-30	5705
2019-12-31	6182
2020-03-31	6117
2020-06-30	5720
2020-09-30	5821
2020-12-31	5722
2021-03-31	5772
2021-06-30	5703
2021-09-30	6162
2021-12-31	4970
2022-03-31	4728
2022-06-30	4269
2022-09-30	3970
2022-12-31	4001
2023-03-31	4040
2023-06-30	4342
2023-09-30	3628