Quarter US dollars 2004-12-31 2 2005-03-31 43 2005-06-30 2 2005-09-30 103 2005-12-31 9 2006-03-31 9 2006-06-30 20 2006-09-30 21 2006-12-31 162 2007-03-31 20 2007-06-30 18 2007-09-30 18 2007-12-31 6 2008-03-31 270 2008-06-30 18 2008-09-30 18 2008-12-31 3 2009-03-31 27 2009-06-30 2 2009-09-30 3 2009-12-31 2 2010-03-31 2 2010-06-30 0 2010-09-30 5 2010-12-31 5 2011-03-31 6 2011-06-30 6 2011-09-30 6 2011-12-31 5 2012-03-31 245 2012-06-30 245 2012-09-30 244 2012-12-31 243 2013-03-31 229 2013-06-30 228 2013-09-30 215 2013-12-31 215 2014-03-31 200 2014-06-30 200 2014-09-30 190 2014-12-31 190 2015-03-31 196 2015-06-30 241 2015-09-30 217 2015-12-31 199 2016-03-31 183 2016-06-30 176 2016-09-30 169 2016-12-31 161 2017-03-31 146 2017-06-30 49 2017-09-30 148 2017-12-31 99 2018-03-31 17 2018-06-30 12 2018-09-30 7 2018-12-31 15 2019-03-31 13 2019-06-30 4 2019-09-30 4 2019-12-31 45 2020-03-31 45 2020-06-30 46 2020-09-30 45 2020-12-31 45 2021-03-31 44 2021-06-30 44 2021-09-30 44 2021-12-31 42 2022-03-31 41 2022-06-30 40 2022-09-30 39 2022-12-31 1 2023-03-31 0 2023-06-30 0 2023-09-30 0