Quarter US dollars 2004-12-31 129 2005-03-31 418 2005-06-30 142 2005-09-30 232 2005-12-31 209 2006-03-31 461 2006-06-30 634 2006-09-30 161 2006-12-31 282 2007-03-31 261 2007-06-30 241 2007-09-30 222 2007-12-31 261 2008-03-31 282 2008-06-30 283 2008-09-30 303 2008-12-31 326 2009-03-31 768 2009-06-30 926 2009-09-30 613 2009-12-31 975 2010-03-31 180 2010-06-30 546 2010-09-30 246 2010-12-31 396 2011-03-31 181