Quarter	US dollars
2004-12-31	4429
2005-03-31	4374
2005-06-30	5318
2005-09-30	6063
2005-12-31	5574
2006-03-31	4662
2006-06-30	5879
2006-09-30	5847
2006-12-31	10437
2007-03-31	11909
2007-06-30	12309
2007-09-30	12561
2007-12-31	12361
2008-03-31	16574
2008-06-30	17600
2008-09-30	18382
2008-12-31	17428
2009-03-31	12928
2009-06-30	10528
2009-09-30	9340
2009-12-31	10407
2010-03-31	12437
2010-06-30	11997
2010-09-30	13244
2010-12-31	19296
2011-03-31	19584
2011-06-30	25635
2011-09-30	22695
2011-12-31	21254
2012-03-31	21926
2012-06-30	22470
2012-09-30	22825
2012-12-31	21914
2013-03-31	23921
2013-06-30	23061
2013-09-30	25167
2013-12-31	23138
2014-03-31	21887
2014-06-30	25981
2014-09-30	26886
2014-12-31	28118
2015-03-31	25550
2015-06-30	22348
2015-09-30	20199
2015-12-31	18922
2016-03-31	18732
2016-06-30	16323
2016-09-30	11125
2016-12-31	11115
2017-03-31	11286
2017-06-30	10237
2017-09-30	12060
2017-12-31	10790
2018-03-31	11921
2018-06-30	11497
2018-09-30	12210
2018-12-31	12796
2019-03-31	13549
2019-06-30	8843
2019-09-30	8848
2019-12-31	13371
2020-03-31	11063
2020-06-30	10467
2020-09-30	8280
2020-12-31	7895
2021-03-31	6301
2021-06-30	6911
2021-09-30	6088
2021-12-31	7360
2022-03-31	7071
2022-06-30	8106
2022-09-30	7933
2022-12-31	8988
2023-03-31	8691
2023-06-30	7806
2023-09-30	7104