Quarter	US dollars
2004-12-31	2049
2005-03-31	1836
2005-06-30	1999
2005-09-30	2142
2005-12-31	1921
2006-03-31	2121
2006-06-30	2238
2006-09-30	2003
2006-12-31	1699
2007-03-31	2087
2007-06-30	2416
2007-09-30	2844
2007-12-31	4071
2008-03-31	6958
2008-06-30	6508
2008-09-30	7569
2008-12-31	10131
2009-03-31	10290
2009-06-30	5421
2009-09-30	4993
2009-12-31	4870
2010-03-31	5010
2010-06-30	6148
2010-09-30	8620
2010-12-31	12851
2011-03-31	7412
2011-06-30	9165
2011-09-30	14666
2011-12-31	8201
2012-03-31	6678
2012-06-30	7388
2012-09-30	6847
2012-12-31	5518
2013-03-31	7196
2013-06-30	6012
2013-09-30	5561
2013-12-31	5274
2014-03-31	3560
2014-06-30	3341
2014-09-30	3147
2014-12-31	4089
2015-03-31	3785
2015-06-30	3029
2015-09-30	4070
2015-12-31	3282
2016-03-31	3671
2016-06-30	3364
2016-09-30	2703
2016-12-31	3775
2017-03-31	2784
2017-06-30	2628
2017-09-30	2778
2017-12-31	3772
2018-03-31	3221
2018-06-30	1954
2018-09-30	2016
2018-12-31	2429
2019-03-31	1560
2019-06-30	1977
2019-09-30	2627
2019-12-31	2584
2020-03-31	5078
2020-06-30	3417
2020-09-30	3331
2020-12-31	4750
2021-03-31	3946
2021-06-30	3264
2021-09-30	3461
2021-12-31	3113
2022-03-31	2946
2022-06-30	4450
2022-09-30	5023
2022-12-31	3976
2023-03-31	3053
2023-06-30	3912
2023-09-30	3939