Quarter US dollars 2004-12-31 17 2005-03-31 11 2005-06-30 7 2005-09-30 18 2005-12-31 72 2006-03-31 26 2006-06-30 63 2006-09-30 52 2006-12-31 70 2007-03-31 51 2007-06-30 44 2007-09-30 45 2007-12-31 119 2008-03-31 28 2008-06-30 24 2008-09-30 45 2008-12-31 104 2009-03-31 53 2009-06-30 35 2009-09-30 35 2009-12-31 15 2010-03-31 29 2010-06-30 12 2010-09-30 38 2010-12-31 34 2011-03-31 56 2011-06-30 85 2011-09-30 70 2011-12-31 83 2012-03-31 42 2012-06-30 39 2012-09-30 26 2012-12-31 31 2013-03-31 38 2013-06-30 14 2013-09-30 15 2013-12-31 76 2014-03-31 43 2014-06-30 32 2014-09-30 23 2014-12-31 125 2015-03-31 174 2015-06-30 8 2015-09-30 36 2015-12-31 33 2016-03-31 3 2016-06-30 3 2016-09-30 3 2016-12-31 2 2017-03-31 0 2017-06-30 3 2017-09-30 3 2017-12-31 3 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 1 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 5 2023-06-30 4 2023-09-30 0