Quarter US dollars 2004-12-31 4 2005-03-31 2 2005-06-30 455 2005-09-30 4 2005-12-31 3 2006-03-31 23 2006-06-30 4 2006-09-30 9 2006-12-31 8 2007-03-31 6 2007-06-30 6 2007-09-30 8 2007-12-31 247 2008-03-31 427 2008-06-30 54 2008-09-30 46 2008-12-31 42 2009-03-31 42 2009-06-30 41 2009-09-30 38 2009-12-31 31 2010-03-31 26 2010-06-30 262 2010-09-30 65 2010-12-31 58 2011-03-31 55 2011-06-30 58 2011-09-30 53 2011-12-31 3 2012-03-31 8 2012-06-30 9 2012-09-30 42 2012-12-31 45 2013-03-31 8 2013-06-30 8 2013-09-30 10 2013-12-31 8 2014-03-31 8 2014-06-30 9 2014-09-30 6 2014-12-31 8 2015-03-31 0 2015-06-30 6 2015-09-30 8 2015-12-31 9 2016-03-31 9 2016-06-30 7 2016-09-30 18 2016-12-31 6 2017-03-31 6 2017-06-30 6 2017-09-30 42 2017-12-31 35 2018-03-31 73 2018-06-30 79 2018-09-30 68 2018-12-31 188 2019-03-31 192 2019-06-30 187 2019-09-30 150 2019-12-31 161 2020-03-31 0 2020-06-30 0 2020-09-30 4 2020-12-31 7 2021-03-31 4 2021-06-30 6 2021-09-30 13 2021-12-31 13 2022-03-31 5 2022-06-30 0 2022-09-30 0 2022-12-31 12 2023-03-31 0 2023-06-30 0 2023-09-30 0