Quarter	US dollars
2004-12-31	2110
2005-03-31	2208
2005-06-30	2332
2005-09-30	2183
2005-12-31	2573
2006-03-31	2633
2006-06-30	2576
2006-09-30	2673
2006-12-31	2849
2007-03-31	3067
2007-06-30	2961
2007-09-30	3062
2007-12-31	3026
2008-03-31	2880
2008-06-30	3009
2008-09-30	3195
2008-12-31	3281
2009-06-30	3182
2009-09-30	3226
2010-03-31	3710
2010-06-30	3718
2010-09-30	3422
2010-12-31	3666
2011-03-31	3765
2011-06-30	3704
2011-09-30	3619
2011-12-31	3786
2012-03-31	3947
2012-06-30	3948
2012-09-30	3814
2012-12-31	3774
2013-03-31	3572
2013-06-30	3511
2014-03-31	3330
2014-06-30	3236
2014-09-30	3325
2014-12-31	3211
2015-03-31	2953
2015-06-30	3108
2015-09-30	2492
2015-12-31	2362
2016-03-31	2390
2016-06-30	2021
2016-09-30	1989
2016-12-31	2098
2017-03-31	2127
2017-06-30	2059
2017-09-30	2019
2017-12-31	2120
2018-03-31	2328
2018-06-30	2131
2018-09-30	2132
2018-12-31	2136
2019-03-31	2209
2019-06-30	2355
2019-09-30	2384
2019-12-31	2333
2020-03-31	2271
2020-06-30	2207
2020-09-30	1949
2020-12-31	1885
2021-03-31	1998
2021-06-30	2001
2021-09-30	2017
2021-12-31	1956
2022-03-31	2585
2022-06-30	2716
2022-09-30	2723
2022-12-31	2863
2023-03-31	2800
2023-06-30	2665
2023-09-30	2909