Quarter US dollars 2004-12-31 167 2005-03-31 166 2005-06-30 210 2005-09-30 184 2005-12-31 173 2006-03-31 217 2006-06-30 172 2006-09-30 192 2006-12-31 219 2007-03-31 167 2007-06-30 189 2007-09-30 187 2007-12-31 177 2008-03-31 197 2008-06-30 263 2008-09-30 210 2008-12-31 631 2009-03-31 750 2009-06-30 624 2009-09-30 582 2009-12-31 756 2010-03-31 761 2010-06-30 982 2010-09-30 1008 2010-12-31 1101 2011-03-31 422 2011-06-30 337 2011-09-30 377 2011-12-31 391 2012-03-31 433 2012-06-30 530 2012-09-30 425 2012-12-31 556 2013-03-31 874 2013-06-30 928 2013-09-30 889 2013-12-31 901 2014-03-31 944 2014-06-30 1084 2014-09-30 1007 2014-12-31 960 2015-03-31 1026 2015-06-30 881 2015-09-30 826 2015-12-31 808 2016-03-31 771 2016-06-30 988 2016-09-30 957 2016-12-31 673 2017-03-31 674 2017-06-30 902 2017-09-30 923 2017-12-31 974 2018-03-31 869 2018-06-30 809 2018-09-30 915 2018-12-31 922 2019-03-31 936 2019-06-30 999 2019-09-30 1101 2019-12-31 1096 2020-03-31 1264 2020-06-30 924 2020-09-30 1152 2020-12-31 1349 2021-03-31 1282 2021-06-30 1242 2021-09-30 1185 2021-12-31 1218 2022-03-31 1339 2022-06-30 1076 2022-09-30 942 2022-12-31 927 2023-03-31 1162 2023-06-30 768 2023-09-30 709