Quarter US dollars 2004-12-31 232 2005-03-31 4 2005-06-30 7 2005-09-30 7 2005-12-31 67 2006-03-31 149 2006-06-30 70 2006-09-30 67 2006-12-31 14 2007-03-31 16 2007-06-30 16 2007-09-30 20 2007-12-31 4 2008-03-31 18 2008-06-30 22 2008-09-30 12 2008-12-31 9 2009-03-31 63 2009-06-30 63 2009-09-30 66 2009-12-31 78 2010-03-31 14 2010-06-30 190 2010-09-30 197 2010-12-31 152 2011-03-31 229 2011-06-30 51 2011-09-30 56 2011-12-31 49 2012-03-31 10 2012-06-30 157 2012-09-30 105 2012-12-31 95 2013-03-31 43 2013-06-30 0 2013-09-30 28 2013-12-31 28 2014-03-31 28 2014-06-30 36 2014-09-30 11 2014-12-31 17 2015-03-31 15 2015-06-30 9 2015-09-30 9 2015-12-31 13 2016-03-31 0 2016-06-30 0 2016-09-30 6 2016-12-31 6 2017-03-31 0 2017-06-30 0 2017-09-30 0 2017-12-31 0 2018-03-31 34 2018-06-30 26 2018-09-30 20 2018-12-31 15 2019-03-31 8 2019-06-30 6 2019-09-30 7 2019-12-31 22 2020-03-31 5 2020-06-30 0 2020-09-30 1 2020-12-31 0 2021-03-31 0 2021-06-30 0 2021-09-30 24 2021-12-31 7 2022-03-31 8 2022-06-30 7 2022-09-30 0 2022-12-31 0 2023-03-31 0 2023-06-30 0 2023-09-30 0