Quarter US dollars 2004-12-31 188 2005-03-31 204 2005-06-30 113 2005-09-30 172 2005-12-31 228 2006-03-31 369 2006-06-30 270 2006-09-30 316 2006-12-31 272 2007-03-31 108 2007-06-30 217 2007-09-30 261 2007-12-31 346 2008-03-31 399 2008-06-30 308 2008-09-30 463 2008-12-31 298 2009-03-31 252 2009-06-30 188 2009-09-30 133 2009-12-31 129 2010-03-31 132 2010-06-30 120 2010-09-30 39 2010-12-31 36 2011-03-31 55 2011-06-30 67 2011-09-30 42 2011-12-31 192 2012-03-31 243 2012-06-30 227 2012-09-30 226 2012-12-31 139 2013-03-31 121 2013-06-30 147 2013-09-30 52 2013-12-31 56 2014-03-31 38 2014-06-30 15 2014-09-30 58 2014-12-31 164 2015-03-31 163 2015-06-30 162 2015-09-30 154 2015-12-31 154 2016-03-31 131 2016-06-30 82 2016-09-30 31 2016-12-31 100 2017-03-31 111 2017-06-30 155 2017-09-30 85 2017-12-31 47 2018-03-31 135 2018-06-30 107 2018-09-30 47 2018-12-31 55 2019-03-31 146 2019-06-30 88 2019-09-30 27 2019-12-31 78 2020-03-31 99 2020-06-30 7 2020-09-30 1 2020-12-31 1 2021-03-31 1 2021-06-30 1 2021-09-30 7 2021-12-31 1 2022-03-31 1 2022-06-30 5 2022-09-30 0 2022-12-31 0 2023-03-31 4 2023-06-30 0 2023-09-30 3