Quarter	US dollars
2004-12-31	29
2005-03-31	26
2005-06-30	23
2005-09-30	21
2005-12-31	19
2006-03-31	19
2006-06-30	17
2006-09-30	17
2006-12-31	16
2007-03-31	16
2007-06-30	16
2007-09-30	14
2007-12-31	14
2008-03-31	8
2008-06-30	4
2008-09-30	4
2008-12-31	4
2009-03-31	3
2009-06-30	23
2009-09-30	24
2009-12-31	5
2010-03-31	5
2010-06-30	4
2010-09-30	5
2010-12-31	5
2011-03-31	16
2011-06-30	66
2011-09-30	70
2011-12-31	77
2012-03-31	82
2012-06-30	246
2012-09-30	71
2012-12-31	121
2013-03-31	73
2013-06-30	23
2013-09-30	144
2013-12-31	136
2014-03-31	88
2014-06-30	357
2014-09-30	251
2014-12-31	165
2015-03-31	200
2015-06-30	178
2015-09-30	164
2015-12-31	325
2016-03-31	267
2016-06-30	293
2016-09-30	362
2016-12-31	1257
2017-03-31	1668
2017-06-30	1767
2017-09-30	1968
2017-12-31	1914
2018-03-31	2067
2018-06-30	2124
2018-09-30	1882
2018-12-31	1794
2019-03-31	1921
2019-06-30	1702
2019-09-30	1694
2019-12-31	1723
2020-03-31	1780
2020-06-30	1734
2020-09-30	1738
2020-12-31	1628
2021-03-31	1707
2021-06-30	1726
2021-09-30	1409
2021-12-31	1559
2022-03-31	1411
2022-06-30	1824
2022-09-30	1732
2022-12-31	1618
2023-03-31	1417
2023-06-30	1166
2023-09-30	1116