Quarter	US dollars
2004-12-31	1039
2005-03-31	1113
2005-06-30	1154
2005-09-30	1208
2005-12-31	1181
2006-03-31	1070
2006-06-30	1781
2006-09-30	1956
2006-12-31	1935
2007-03-31	1975
2007-06-30	1691
2007-09-30	2461
2007-12-31	2479
2008-03-31	2542
2008-06-30	2701
2008-09-30	2639
2008-12-31	2409
2009-03-31	2337
2009-06-30	2281
2009-09-30	2197
2009-12-31	2299
2010-03-31	2633
2010-06-30	2971
2010-09-30	3179
2010-12-31	3403
2011-03-31	3549
2011-06-30	3866
2011-09-30	4219
2011-12-31	4085
2012-03-31	4241
2012-06-30	4158
2012-09-30	4346
2012-12-31	4522
2013-03-31	4302
2013-06-30	4395
2013-09-30	4270
2013-12-31	4054
2014-03-31	3486
2014-06-30	3510
2014-09-30	3510
2014-12-31	3630
2015-03-31	3606
2015-06-30	3973
2015-09-30	4099
2015-12-31	3152
2016-03-31	2937
2016-06-30	2851
2016-09-30	2902
2016-12-31	3007
2017-03-31	3217
2017-06-30	3563
2017-09-30	3824
2017-12-31	3791
2018-03-31	4269
2018-06-30	3396
2018-09-30	2669
2018-12-31	2535
2019-03-31	2563
2019-06-30	2775
2019-09-30	2276
2019-12-31	2383
2020-03-31	2178
2020-06-30	2060
2020-09-30	1941
2020-12-31	1739
2021-03-31	1843
2021-06-30	1944
2021-09-30	2087
2021-12-31	1966
2022-03-31	2044
2022-06-30	2136
2022-09-30	2221
2022-12-31	2087
2023-03-31	2057
2023-06-30	2218
2023-09-30	1875