Quarter US dollars 2004-12-31 15 2005-03-31 53 2005-06-30 54 2005-09-30 28 2005-12-31 50 2006-03-31 24 2006-06-30 48 2006-09-30 49 2006-12-31 47 2007-03-31 51 2007-06-30 50 2007-09-30 37 2007-12-31 66 2008-03-31 52 2008-06-30 52 2008-09-30 43 2008-12-31 7 2009-03-31 7 2009-06-30 69 2009-09-30 72 2009-12-31 144 2010-03-31 89 2010-06-30 24 2010-09-30 25 2010-12-31 25 2011-03-31 14