Quarter US dollars 2004-12-31 244 2005-03-31 208 2005-06-30 215 2005-09-30 248 2005-12-31 292 2006-03-31 286 2006-06-30 222 2006-09-30 275 2006-12-31 235 2007-03-31 331 2007-06-30 381 2007-09-30 481 2007-12-31 557 2008-03-31 741 2008-06-30 645 2008-09-30 408 2008-12-31 466 2009-03-31 509 2009-06-30 611 2009-09-30 593 2009-12-31 691 2010-03-31 821 2010-06-30 878 2010-09-30 841 2010-12-31 626 2011-03-31 688 2011-06-30 714 2011-09-30 684 2011-12-31 826 2012-03-31 797 2012-06-30 900 2012-09-30 762 2012-12-31 881 2013-03-31 855 2013-06-30 666 2013-09-30 798 2013-12-31 803 2014-03-31 900 2014-06-30 904 2014-09-30 994 2014-12-31 1041 2015-03-31 1087 2015-06-30 1030 2015-09-30 763 2015-12-31 787 2016-03-31 716 2016-06-30 900 2016-09-30 941 2016-12-31 798 2017-03-31 923 2017-06-30 1528 2017-09-30 1410 2017-12-31 1197 2018-03-31 671 2018-06-30 1570 2018-09-30 1432 2018-12-31 1332 2019-03-31 1328 2019-06-30 1274 2019-09-30 1264 2019-12-31 1262 2020-03-31 1681 2020-06-30 1573 2020-09-30 1613 2020-12-31 1611 2021-03-31 1787 2021-06-30 1892 2021-09-30 1700 2021-12-31 1787 2022-03-31 1693 2022-06-30 1676 2022-09-30 1654 2022-12-31 1239 2023-03-31 1672 2023-06-30 1693 2023-09-30 2094