Quarter US dollars 2004-12-31 227 2005-03-31 261 2005-06-30 183 2005-09-30 196 2005-12-31 215 2006-03-31 212 2006-06-30 159 2006-09-30 157 2006-12-31 166 2007-03-31 175 2007-06-30 0 2007-09-30 43 2007-12-31 16 2008-03-31 12 2008-06-30 0 2008-09-30 2 2008-12-31 0 2009-03-31 1 2009-06-30 63 2009-09-30 32 2009-12-31 176 2010-03-31 180 2010-06-30 156 2010-09-30 183 2010-12-31 327 2011-03-31 321 2011-06-30 316 2011-09-30 337 2011-12-31 263 2012-03-31 385 2012-06-30 298 2012-09-30 286 2012-12-31 183 2013-03-31 194 2013-06-30 191 2013-09-30 74 2013-12-31 71 2014-03-31 142 2014-06-30 260 2014-09-30 248 2014-12-31 250 2015-03-31 232 2015-06-30 208 2015-09-30 251 2015-12-31 64 2016-03-31 56 2016-06-30 85 2016-09-30 61 2016-12-31 60 2017-03-31 36 2017-06-30 1 2017-09-30 1 2017-12-31 0 2018-03-31 1 2018-06-30 -3 2018-09-30 4 2018-12-31 1 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 1 2021-03-31 3 2021-06-30 1 2021-09-30 1 2021-12-31 1 2022-03-31 1 2022-06-30 1 2022-09-30 1 2022-12-31 4 2023-03-31 1 2023-06-30 1 2023-09-30 1