Quarter US dollars 2004-12-31 46 2005-03-31 36 2005-06-30 36 2005-09-30 57 2005-12-31 53 2006-03-31 50 2006-06-30 59 2006-09-30 54 2006-12-31 72 2007-03-31 67 2007-06-30 66 2007-09-30 37 2007-12-31 52 2008-03-31 66 2008-06-30 80 2008-09-30 77 2008-12-31 68 2009-03-31 85 2009-06-30 61 2009-09-30 64 2009-12-31 78 2010-03-31 62 2010-06-30 70 2010-09-30 5 2010-12-31 0 2011-03-31 0 2011-06-30 0 2011-09-30 2 2011-12-31 2 2012-03-31 3 2012-06-30 2 2012-09-30 3 2012-12-31 0 2013-03-31 2 2013-06-30 437 2013-09-30 65 2013-12-31 20 2014-03-31 17 2014-06-30 19 2014-09-30 18 2014-12-31 25 2015-03-31 19 2015-06-30 19 2015-09-30 0 2015-12-31 0 2016-03-31 0 2016-06-30 0 2016-09-30 0 2016-12-31 0 2017-03-31 0 2017-06-30 0 2017-09-30 0 2017-12-31 0 2018-03-31 0 2018-06-30 0 2018-09-30 0 2018-12-31 0 2019-03-31 0 2019-06-30 0 2019-09-30 0 2019-12-31 0 2020-03-31 0 2020-06-30 0 2020-09-30 0 2020-12-31 0 2021-03-31 0 2021-06-30 0 2021-09-30 0 2021-12-31 0 2022-03-31 0 2022-06-30 0 2022-09-30 0 2022-12-31 0 2023-03-31 0 2023-06-30 0 2023-09-30 0