Quarter US dollars 2004-12-31 770 2005-03-31 696 2005-06-30 798 2005-09-30 688 2005-12-31 755 2006-03-31 872 2006-06-30 884 2006-09-30 342 2006-12-31 474 2007-03-31 539 2007-06-30 1228 2007-09-30 1049 2007-12-31 1511 2008-03-31 1057 2008-06-30 1019 2008-09-30 1037 2008-12-31 1060 2009-03-31 868 2009-06-30 891 2009-09-30 1124 2009-12-31 1098 2010-03-31 1018 2010-06-30 1242 2010-09-30 1254 2010-12-31 1578 2011-03-31 1742 2011-06-30 1994 2011-09-30 2183 2011-12-31 3168 2012-03-31 1823 2012-06-30 2317 2012-09-30 2062 2012-12-31 2270 2013-03-31 2277 2013-06-30 890 2013-09-30 921 2013-12-31 980 2014-03-31 1039 2014-06-30 1349 2014-09-30 1269 2014-12-31 1103 2015-03-31 1206 2015-06-30 1026 2015-09-30 907 2015-12-31 857 2016-03-31 858 2016-06-30 732 2016-09-30 708 2016-12-31 496 2017-03-31 740 2017-06-30 1293 2017-09-30 1283 2017-12-31 1281 2018-03-31 1674 2018-06-30 1748 2018-09-30 1380 2018-12-31 944 2019-03-31 1053 2019-06-30 1004 2019-09-30 876 2019-12-31 878 2020-03-31 883 2020-06-30 885 2020-09-30 889 2020-12-31 920 2021-03-31 1278 2021-06-30 1195 2021-09-30 1145 2021-12-31 1222 2022-03-31 1740 2022-06-30 1520 2022-09-30 1596 2022-12-31 1333 2023-03-31 1326 2023-06-30 1444 2023-09-30 1211