Quarter US dollars 2004-12-31 152 2005-03-31 98 2005-06-30 77 2005-09-30 87 2005-12-31 82 2006-03-31 83 2006-06-30 100 2006-09-30 101 2006-12-31 213 2007-03-31 228 2007-06-30 130 2007-09-30 2 2007-12-31 255 2008-03-31 119 2008-06-30 247 2008-09-30 283 2008-12-31 269 2009-03-31 274 2009-06-30 323 2009-09-30 275 2009-12-31 262 2010-03-31 243 2010-06-30 153 2010-09-30 96 2010-12-31 0 2011-03-31 11 2011-09-30 11 2011-12-31 11 2012-03-31 10 2012-09-30 0 2013-03-31 0 2013-06-30 0 2013-09-30 0 2013-12-31 0 2014-06-30 0 2014-09-30 0 2014-12-31 0 2015-03-31 0 2015-06-30 0 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