Quarter	US dollars
2004-12-31	511
2005-03-31	544
2005-06-30	579
2005-09-30	658
2005-12-31	594
2006-03-31	725
2006-06-30	758
2006-09-30	751
2006-12-31	996
2007-03-31	853
2007-06-30	789
2007-09-30	823
2007-12-31	1047
2008-03-31	1483
2008-06-30	1992
2008-09-30	2210
2008-12-31	1679
2009-03-31	1963
2009-06-30	1782
2009-09-30	1834
2009-12-31	1660
2010-03-31	1944
2010-06-30	2261
2010-09-30	2094
2010-12-31	2043
2011-03-31	2180
2011-06-30	2432
2011-09-30	3094
2011-12-31	2803
2012-03-31	2595
2012-06-30	3148
2012-09-30	3147
2012-12-31	2650
2013-03-31	2846
2013-06-30	3137
2013-09-30	3394
2013-12-31	3826
2014-03-31	3977
2014-06-30	4363
2014-09-30	4463
2014-12-31	4632
2015-03-31	5127
2015-06-30	5014
2015-09-30	4888
2015-12-31	4435
2016-03-31	3896
2016-06-30	3541
2016-09-30	3310
2016-12-31	3313
2017-03-31	3344
2017-06-30	3806
2017-09-30	3744
2017-12-31	3537
2018-03-31	3417
2018-06-30	3183
2018-09-30	3191
2018-12-31	3222
2019-03-31	3237
2019-06-30	3557
2019-09-30	3392
2019-12-31	3399
2020-03-31	3196
2020-06-30	3510
2020-09-30	2886
2020-12-31	2827
2021-03-31	2941
2021-06-30	2992
2021-09-30	3024
2021-12-31	2934
2022-03-31	2835
2022-06-30	2876
2022-09-30	2405
2022-12-31	2218
2023-03-31	2119
2023-06-30	1594
2023-09-30	1505