Quarter US dollars 2004-12-31 83 2005-03-31 74 2005-06-30 68 2005-09-30 198 2005-12-31 263 2006-03-31 196 2006-06-30 168 2006-09-30 127 2006-12-31 205 2007-03-31 171 2007-06-30 156 2007-09-30 145 2007-12-31 185 2008-03-31 171 2008-06-30 157 2008-09-30 155 2008-12-31 154 2009-03-31 159 2009-06-30 171 2009-09-30 131 2009-12-31 92 2010-03-31 93 2010-06-30 82 2010-09-30 84 2010-12-31 70 2011-03-31 66 2011-06-30 71 2011-09-30 3435 2011-12-31 3347 2012-03-31 3270 2012-06-30 3230 2012-09-30 3202 2012-12-31 3187 2013-03-31 3138 2013-06-30 3085 2013-09-30 3223 2013-12-31 3233 2014-03-31 3246 2014-06-30 3324 2014-09-30 3398 2014-12-31 3449 2015-03-31 3511 2015-06-30 3084 2015-09-30 3563 2015-12-31 3577 2016-03-31 3582 2016-06-30 3677 2016-09-30 3802 2016-12-31 3890 2017-03-31 3987 2017-06-30 4426 2017-09-30 4657 2017-12-31 4733 2018-03-31 4583 2018-06-30 4756 2018-09-30 4923 2018-12-31 5345 2019-03-31 5437 2019-06-30 6246 2019-09-30 6899 2019-12-31 6826 2020-03-31 7080 2020-06-30 7171 2020-09-30 7434 2020-12-31 7844 2021-03-31 7810 2021-06-30 7866 2021-09-30 8236 2021-12-31 8534 2022-03-31 8609 2022-06-30 8558 2022-09-30 8630 2022-12-31 8611 2023-03-31 9182 2023-06-30 10040 2023-09-30 10095