Quarter US dollars 2004-12-31 3598 2005-03-31 5501 2005-06-30 6285 2005-09-30 6783 2005-12-31 6669 2006-03-31 8489 2006-06-30 7706 2006-09-30 8261 2006-12-31 9621 2007-03-31 11311 2007-06-30 13248 2007-09-30 14150 2007-12-31 14816 2008-03-31 16441 2008-06-30 18008 2008-09-30 16964 2008-12-31 9827 2009-03-31 13503 2009-06-30 18813 2009-09-30 22822 2009-12-31 23079 2010-03-31 27310 2010-06-30 26297 2010-09-30 36777 2010-12-31 30355 2011-03-31 31602 2011-06-30 37585 2011-09-30 31965 2011-12-31 31950 2012-03-31 35334 2012-06-30 29002 2012-09-30 27624 2012-12-31 25696 2013-03-31 23150 2013-06-30 16188 2013-09-30 19804 2013-12-31 18591 2014-03-31 21495 2014-06-30 17023 2014-09-30 15755 2014-12-31 13485 2015-03-31 15484 2015-06-30 14785 2015-09-30 11294 2015-12-31 9831 2016-03-31 12438 2016-06-30 14033 2016-09-30 3406 2016-12-31 2809 2017-03-31 3534 2017-06-30 2555 2017-09-30 3499 2017-12-31 2741 2018-03-31 3796 2018-06-30 3685 2018-09-30 5636 2018-12-31 6708 2019-03-31 7856 2019-06-30 7193 2019-09-30 12444 2019-12-31 8910 2020-03-31 5956 2020-06-30 4562 2020-09-30 5021 2020-12-31 10465 2021-03-31 10903 2021-06-30 9841 2021-09-30 9646 2021-12-31 23473 2022-03-31 16216 2022-06-30 3174 2022-09-30 19649 2022-12-31 23259 2023-03-31 23954 2023-06-30 24185 2023-09-30 8838