Quarter	US dollars
2004-12-31	1728
2005-03-31	1805
2005-06-30	1864
2005-09-30	2098
2005-12-31	2450
2006-03-31	3152
2006-06-30	3869
2006-09-30	3604
2006-12-31	4100
2007-03-31	4130
2007-06-30	5118
2007-09-30	5542
2007-12-31	5228
2008-03-31	5376
2008-06-30	5031
2008-09-30	4944
2008-12-31	4835
2009-03-31	5232
2009-06-30	5550
2009-09-30	6775
2009-12-31	8891
2010-03-31	6839
2010-06-30	6125
2010-09-30	6915
2010-12-31	13013
2011-03-31	12940
2011-06-30	17337
2011-09-30	41753
2011-12-31	37627
2012-03-31	51785
2012-06-30	33745
2012-09-30	55622
2012-12-31	77330
2013-03-31	78976
2013-06-30	100163
2013-09-30	95213
2013-12-31	76544
2014-03-31	89236
2014-06-30	86396
2014-09-30	74614
2014-12-31	66777
2015-03-31	56327
2015-06-30	55740
2015-09-30	49772
2015-12-31	46422
2016-03-31	47092
2016-06-30	43358
2016-09-30	42418
2016-12-31	39424
2017-03-31	39877
2017-06-30	37248
2017-09-30	37618
2017-12-31	38168
2018-03-31	34626
2018-06-30	33839
2018-09-30	32395
2018-12-31	33213
2019-03-31	32915
2019-06-30	33681
2019-09-30	32692
2019-12-31	30812
2020-03-31	30255
2020-06-30	30493
2020-09-30	30812
2020-12-31	30571
2021-03-31	32197
2021-06-30	28527
2021-09-30	29925
2021-12-31	30172
2022-03-31	31481
2022-06-30	30723
2022-09-30	30071
2022-12-31	28581
2023-03-31	29315
2023-06-30	25227
2023-09-30	24809