Quarter	US dollars
2004-12-31	2169
2005-03-31	1866
2005-06-30	2178
2005-09-30	1924
2005-12-31	1809
2006-03-31	2078
2006-06-30	2092
2006-09-30	1638
2006-12-31	4879
2007-03-31	2381
2007-06-30	3507
2007-09-30	3352
2007-12-31	4326
2008-03-31	6267
2008-06-30	5889
2008-09-30	4819
2008-12-31	8834
2009-03-31	7382
2009-06-30	7671
2009-09-30	8027
2009-12-31	7549
2010-03-31	7004
2010-06-30	6688
2010-09-30	7293
2010-12-31	6137
2011-03-31	5546
2011-06-30	5860
2011-09-30	7375
2011-12-31	6899
2012-03-31	6675
2012-06-30	6627
2012-09-30	4452
2012-12-31	4818
2013-03-31	4275
2013-06-30	3676
2013-09-30	3524
2013-12-31	3625
2014-03-31	3385
2014-06-30	3719
2014-09-30	3696
2014-12-31	4113
2015-03-31	3862
2015-06-30	3125
2015-09-30	2932
2015-12-31	2753
2016-03-31	3009
2016-06-30	2881
2016-09-30	2946
2016-12-31	2185
2017-03-31	2061
2017-06-30	2069
2017-09-30	2062
2017-12-31	1990
2018-03-31	1844
2018-06-30	1131
2018-09-30	973
2018-12-31	1039
2019-03-31	1144
2019-06-30	1231
2019-09-30	3812
2019-12-31	2917
2020-03-31	3871
2020-06-30	4046
2020-09-30	3990
2020-12-31	3938
2021-03-31	2908
2021-06-30	2814
2021-09-30	2652
2021-12-31	3048
2022-03-31	3797
2022-06-30	6428
2022-09-30	8238
2022-12-31	6034
2023-03-31	6158
2023-06-30	5647
2023-09-30	5428