Quarter US dollars 2004-12-31 171 2005-03-31 108 2005-06-30 298 2005-09-30 115 2005-12-31 124 2006-03-31 116 2006-06-30 111 2006-09-30 148 2006-12-31 141 2007-03-31 228 2007-06-30 239 2007-09-30 440 2007-12-31 239 2008-03-31 191 2008-06-30 231 2008-09-30 225 2008-12-31 357 2009-03-31 371 2009-06-30 459 2009-09-30 456 2009-12-31 444 2010-03-31 519 2010-06-30 467 2010-09-30 1243 2010-12-31 1287 2011-03-31 1273 2011-06-30 1066 2011-09-30 1525 2011-12-31 1865 2012-03-31 681 2012-06-30 1956 2012-09-30 2137 2012-12-31 2082 2013-03-31 1145 2013-06-30 1764 2013-09-30 1925 2013-12-31 1124 2014-03-31 1152 2014-06-30 1053 2014-09-30 1068 2014-12-31 1072 2015-03-31 1042 2015-06-30 813 2015-09-30 6 2015-12-31 7 2016-03-31 10 2016-06-30 8 2016-09-30 0 2016-12-31 0 2017-03-31 0 2017-06-30 1 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 1 2022-09-30 1 2022-12-31 1 2023-03-31 0 2023-06-30 0 2023-09-30 0