Quarter US dollars 2004-12-31 29 2005-03-31 32 2005-06-30 4 2005-09-30 18 2005-12-31 48 2006-03-31 61 2006-06-30 85 2006-09-30 67 2006-12-31 74 2007-03-31 82 2007-06-30 48 2007-09-30 33 2007-12-31 68 2008-03-31 58 2008-06-30 66 2008-09-30 59 2008-12-31 43 2009-03-31 47 2009-06-30 56 2009-09-30 53 2009-12-31 48 2010-03-31 26 2010-06-30 67 2010-09-30 109 2010-12-31 86 2011-03-31 85 2011-06-30 74 2011-09-30 117 2011-12-31 87 2012-03-31 88 2012-06-30 129 2012-09-30 105 2012-12-31 181 2013-03-31 128 2013-06-30 111 2013-09-30 136 2013-12-31 86 2014-03-31 142 2014-06-30 149 2014-09-30 109 2014-12-31 62 2015-03-31 111 2015-06-30 77 2015-09-30 61 2015-12-31 46 2016-03-31 45 2016-06-30 31 2016-09-30 31 2016-12-31 18 2017-03-31 20 2017-06-30 23 2017-09-30 15 2017-12-31 16 2018-03-31 20 2018-06-30 13 2018-09-30 31 2018-12-31 4 2019-03-31 3 2019-06-30 -9 2019-09-30 -2 2019-12-31 15 2020-03-31 29 2020-06-30 10 2020-09-30 27 2020-12-31 31 2021-03-31 26 2021-06-30 76 2021-09-30 57 2021-12-31 82 2022-03-31 104 2022-06-30 97 2022-09-30 66 2022-12-31 30 2023-03-31 38 2023-06-30 39 2023-09-30 16