Quarter	US dollars
2004-12-31	3016
2005-03-31	4047
2005-06-30	3646
2005-09-30	2207
2005-12-31	3036
2006-03-31	3172
2006-06-30	4838
2006-09-30	4461
2006-12-31	3024
2007-03-31	3152
2007-06-30	3110
2007-09-30	4346
2007-12-31	6148
2008-03-31	6704
2008-06-30	5863
2008-09-30	6758
2008-12-31	4904
2009-03-31	4971
2009-06-30	5841
2009-09-30	6213
2009-12-31	5116
2010-03-31	6038
2010-06-30	19430
2010-09-30	21397
2010-12-31	26280
2011-03-31	31539
2011-06-30	36087
2011-09-30	32185
2011-12-31	25662
2012-03-31	26273
2012-06-30	27022
2012-09-30	27176
2012-12-31	21486
2013-03-31	19936
2013-06-30	27014
2013-09-30	29151
2013-12-31	21227
2014-03-31	21888
2014-06-30	20108
2014-09-30	22329
2014-12-31	23275
2015-03-31	21907
2015-06-30	22537
2015-09-30	19471
2015-12-31	17018
2016-03-31	19445
2016-06-30	18795
2016-09-30	17100
2016-12-31	14270
2017-03-31	14434
2017-06-30	27271
2017-09-30	28092
2017-12-31	26661
2018-03-31	22138
2018-06-30	21002
2018-09-30	24365
2018-12-31	24626
2019-03-31	23685
2019-06-30	24803
2019-09-30	23015
2019-12-31	20911
2020-03-31	21107
2020-06-30	21706
2020-09-30	20844
2020-12-31	19874
2021-03-31	22726
2021-06-30	25460
2021-09-30	17649
2021-12-31	18093
2022-03-31	19697
2022-06-30	19638
2022-09-30	16333
2022-12-31	16632
2023-03-31	17463
2023-06-30	20415
2023-09-30	21269