Quarter US dollars 2004-12-31 156 2005-03-31 174 2005-06-30 143 2005-09-30 163 2005-12-31 270 2006-03-31 274 2006-06-30 240 2006-09-30 305 2006-12-31 331 2007-03-31 335 2007-06-30 345 2007-09-30 634 2007-12-31 561 2008-03-31 902 2008-06-30 848 2008-09-30 884 2008-12-31 794 2009-03-31 833 2009-06-30 410 2009-09-30 419 2009-12-31 998 2010-03-31 1040 2010-06-30 1058 2010-09-30 1109 2010-12-31 1177 2011-03-31 1185 2011-06-30 773 2011-09-30 768 2011-12-31 838 2012-03-31 1186 2012-06-30 1154 2012-09-30 1358 2012-12-31 1206 2013-03-31 1753 2013-06-30 1761 2013-09-30 1733 2013-12-31 1803 2014-03-31 1722 2014-06-30 1691 2014-09-30 1637 2014-12-31 1459 2015-03-31 1455 2015-06-30 1328 2015-09-30 1403 2015-12-31 1279 2016-03-31 1251 2016-06-30 1268 2016-09-30 1080 2016-12-31 1115 2017-03-31 1138 2017-06-30 852 2017-09-30 1033 2017-12-31 978 2018-03-31 960 2018-06-30 1063 2018-09-30 1019 2018-12-31 1064 2019-03-31 1025 2019-06-30 1087 2019-09-30 1273 2019-12-31 1341 2020-03-31 1467 2020-06-30 1473 2020-09-30 1569 2020-12-31 1556 2021-03-31 1560 2021-06-30 1596 2021-09-30 1680 2021-12-31 1767 2022-03-31 1880 2022-06-30 1778 2022-09-30 1898 2022-12-31 1725 2023-03-31 1760 2023-06-30 1660 2023-09-30 1618