Quarter	US dollars
2004-12-31	13021
2005-03-31	14089
2005-06-30	5924
2005-09-30	14219
2005-12-31	12442
2006-03-31	14836
2006-06-30	13983
2006-09-30	10066
2006-12-31	19730
2007-03-31	16206
2007-06-30	20323
2007-09-30	21478
2007-12-31	13389
2008-03-31	6318
2008-06-30	5694
2008-09-30	-633
2008-12-31	8607
2009-03-31	-1529
2009-06-30	-7832
2009-09-30	-6482
2009-12-31	-26345
2010-03-31	-21153
2010-06-30	-31143
2010-09-30	-35101
2010-12-31	-31999
2011-03-31	-28971
2011-06-30	-25953
2011-09-30	-20641
2011-12-31	-11022
2012-03-31	-14229
2012-06-30	-28942
2012-09-30	-22278
2012-12-31	-3895
2013-03-31	-12662
2013-06-30	-17735
2013-09-30	-26139
2013-12-31	-32046
2014-03-31	-22450
2014-06-30	-20441
2014-09-30	-19151
2014-12-31	-25961
2015-03-31	-17919
2015-06-30	-15133
2015-09-30	-9793
2015-12-31	-11657
2016-03-31	-10446
2016-06-30	-13119
2016-09-30	-8232
2016-12-31	-11829
2017-03-31	-5858
2017-06-30	-8140
2017-09-30	-10210
2017-12-31	-2076
2018-03-31	-751
2018-06-30	-7118
2018-09-30	-5421
2018-12-31	-9100
2019-03-31	-8257
2019-06-30	-9523
2019-09-30	-11010
2019-12-31	-12124
2020-03-31	-16652
2020-06-30	-17004
2020-09-30	-9150
2020-12-31	-6173
2021-03-31	-6752
2021-06-30	-12520
2021-09-30	-13960
2021-12-31	-18030
2022-03-31	-15607
2022-06-30	-7437
2022-09-30	-11050
2022-12-31	-7761
2023-03-31	-9528
2023-06-30	-14171
2023-09-30	-15624