Quarter	US dollars
2004-12-31	937
2005-03-31	1199
2005-06-30	1224
2005-09-30	1017
2005-12-31	1372
2006-03-31	1370
2006-06-30	1345
2006-09-30	1192
2006-12-31	1417
2007-03-31	981
2007-06-30	995
2007-09-30	1237
2007-12-31	1435
2008-03-31	1371
2008-06-30	1226
2008-09-30	1367
2008-12-31	1085
2009-03-31	997
2009-06-30	975
2009-09-30	1163
2009-12-31	1059
2010-03-31	1230
2010-06-30	1320
2010-09-30	1662
2010-12-31	2422
2011-03-31	1736
2011-06-30	1803
2011-09-30	2328
2011-12-31	2718
2012-03-31	2447
2012-06-30	2402
2012-09-30	3164
2012-12-31	3308
2013-03-31	2525
2013-06-30	2389
2013-09-30	2623
2013-12-31	3177
2014-03-31	2953
2014-06-30	2876
2014-09-30	2704
2014-12-31	2894
2015-03-31	2462
2015-06-30	2510
2015-09-30	2384
2015-12-31	2521
2016-03-31	2200
2016-06-30	2048
2016-09-30	2020
2016-12-31	2224
2017-03-31	1777
2017-06-30	2073
2017-09-30	2313
2017-12-31	2374
2018-03-31	1734
2018-06-30	1508
2018-09-30	1260
2018-12-31	1454
2019-03-31	2044
2019-06-30	1823
2019-09-30	1783
2019-12-31	2041
2020-03-31	1931
2020-06-30	2069
2020-09-30	2263
2020-12-31	2521
2021-03-31	2612
2021-06-30	2695
2021-09-30	1938
2021-12-31	1991
2022-03-31	1933
2022-06-30	1465
2022-09-30	1472
2022-12-31	1485
2023-03-31	2126
2023-06-30	1660
2023-09-30	2115