Quarter	US dollars
2004-12-31	1634
2005-03-31	1658
2005-06-30	1552
2005-09-30	1668
2005-12-31	1766
2006-03-31	1754
2006-06-30	2021
2006-09-30	1909
2006-12-31	2084
2007-03-31	2183
2007-06-30	2275
2007-09-30	2345
2007-12-31	2108
2008-03-31	7443
2008-06-30	8808
2008-09-30	9543
2008-12-31	8871
2009-03-31	8652
2009-06-30	7961
2009-09-30	6784
2009-12-31	6435
2010-03-31	5694
2010-06-30	4933
2010-09-30	5174
2010-12-31	4917
2011-03-31	5072
2011-06-30	4973
2011-09-30	5046
2011-12-31	4583
2012-03-31	4494
2012-06-30	4400
2012-09-30	4417
2012-12-31	4567
2013-03-31	4463
2013-06-30	4350
2013-09-30	4380
2013-12-31	4461
2014-03-31	4648
2014-06-30	4686
2014-09-30	4393
2014-12-31	4294
2015-03-31	4306
2015-06-30	4130
2015-09-30	3997
2015-12-31	3939
2016-03-31	3600
2016-06-30	3633
2016-09-30	3537
2016-12-31	3191
2017-03-31	3199
2017-06-30	3448
2017-09-30	3598
2017-12-31	3507
2018-03-31	4402
2018-06-30	3838
2018-09-30	3640
2018-12-31	3490
2019-03-31	3575
2019-06-30	3809
2019-09-30	3538
2019-12-31	3339
2020-03-31	3388
2020-06-30	3420
2020-09-30	3343
2020-12-31	3298
2021-03-31	3216
2021-06-30	3129
2021-09-30	3091
2021-12-31	2956
2022-03-31	3005
2022-06-30	2903
2022-09-30	2873
2022-12-31	2827
2023-03-31	2899
2023-06-30	2775
2023-09-30	2919