Quarter	US dollars
2004-12-31	1273
2005-03-31	1312
2005-06-30	1411
2005-09-30	1576
2005-12-31	1469
2006-03-31	1512
2006-06-30	1424
2006-09-30	1668
2006-12-31	1552
2007-03-31	1485
2007-06-30	1481
2007-09-30	1748
2007-12-31	1963
2008-03-31	2125
2008-06-30	1859
2008-09-30	2081
2008-12-31	2016
2009-03-31	1919
2009-06-30	1838
2009-09-30	1887
2009-12-31	3863
2010-03-31	2739
2010-06-30	3039
2010-09-30	2779
2010-12-31	2810
2011-03-31	3855
2011-06-30	3805
2011-09-30	3681
2011-12-31	3806
2012-03-31	3572
2012-06-30	4049
2012-09-30	4811
2012-12-31	4871
2013-03-31	5628
2013-06-30	4078
2013-09-30	5316
2013-12-31	2987
2014-03-31	3153
2014-06-30	3678
2014-09-30	3935
2014-12-31	4030
2015-03-31	3865
2015-06-30	3701
2015-09-30	3613
2015-12-31	3481
2016-03-31	3202
2016-06-30	2915
2016-09-30	2968
2016-12-31	2843
2017-03-31	2933
2017-06-30	3185
2017-09-30	3390
2017-12-31	3090
2018-03-31	3411
2018-06-30	3261
2018-09-30	2917
2018-12-31	2692
2019-03-31	2790
2019-06-30	3098
2019-09-30	3026
2019-12-31	2732
2020-03-31	3220
2020-06-30	3063
2020-09-30	2980
2020-12-31	3046
2021-03-31	2992
2021-06-30	2844
2021-09-30	2772
2021-12-31	2391
2022-03-31	2607
2022-06-30	2666
2022-09-30	3009
2022-12-31	3378
2023-03-31	3098
2023-06-30	3264
2023-09-30	3089