Quarter US dollars 2004-12-31 109 2005-03-31 98 2005-06-30 82 2005-09-30 97 2005-12-31 96 2006-03-31 252 2006-06-30 213 2006-09-30 258 2006-12-31 239 2007-03-31 37 2007-06-30 34 2007-09-30 59 2007-12-31 70 2008-03-31 201 2008-06-30 111 2008-09-30 66 2008-12-31 58 2009-03-31 49 2009-06-30 53 2009-09-30 64 2009-12-31 78 2010-03-31 82 2010-06-30 112 2010-09-30 329 2010-12-31 374 2011-03-31 271 2011-06-30 332 2011-09-30 321 2011-12-31 272 2012-03-31 205 2012-06-30 303 2012-09-30 310 2012-12-31 314 2013-03-31 234 2013-06-30 246 2013-09-30 253 2013-12-31 190 2014-03-31 233 2014-06-30 222 2014-09-30 120 2014-12-31 105 2015-03-31 85 2015-06-30 109 2015-09-30 71 2015-12-31 59 2016-03-31 52 2016-06-30 54 2016-09-30 57 2016-12-31 97 2017-03-31 101 2017-06-30 81 2017-09-30 63 2017-12-31 61 2018-03-31 63 2018-06-30 63 2018-09-30 396 2018-12-31 57 2019-03-31 85 2019-06-30 71 2019-09-30 63 2019-12-31 63 2020-03-31 53 2020-06-30 56 2020-09-30 61 2020-12-31 71 2021-03-31 55 2021-06-30 61 2021-09-30 69 2021-12-31 66 2022-03-31 67 2022-06-30 85 2022-09-30 91 2022-12-31 103 2023-03-31 120 2023-06-30 138 2023-09-30 122