Quarter	US dollars
2004-12-31	11936
2005-03-31	13980
2005-06-30	17459
2005-09-30	19887
2005-12-31	18737
2006-03-31	20524
2006-06-30	21468
2006-09-30	22643
2006-12-31	26339
2007-03-31	28651
2007-06-30	31669
2007-09-30	32717
2007-12-31	36772
2008-03-31	40440
2008-06-30	48342
2008-09-30	44349
2008-12-31	36285
2009-03-31	36035
2009-06-30	42650
2009-09-30	50348
2009-12-31	49970
2010-03-31	53731
2010-06-30	52925
2010-09-30	63343
2010-12-31	65848
2011-03-31	68384
2011-06-30	78578
2011-09-30	67217
2011-12-31	65958
2012-03-31	66181
2012-06-30	57244
2012-09-30	58650
2012-12-31	54755
2013-03-31	57530
2013-06-30	47775
2013-09-30	54080
2013-12-31	47959
2014-03-31	51880
2014-06-30	53585
2014-09-30	50017
2014-12-31	48269
2015-03-31	43747
2015-06-30	43148
2015-09-30	34802
2015-12-31	33051
2016-03-31	36000
2016-06-30	37116
2016-09-30	2499
2016-12-31	2143
2017-03-31	2271
2017-06-30	2598
2017-09-30	2776
2017-12-31	2231
2018-03-31	2031
2018-06-30	1933
2018-09-30	1877
2018-12-31	1846
2019-03-31	1746
2019-06-30	994
2019-09-30	973
2019-12-31	1675
2020-03-31	1521
2020-06-30	1923
2020-09-30	1522
2020-12-31	2073
2021-03-31	1667
2021-06-30	1405
2021-09-30	1552
2021-12-31	1817
2022-03-31	2249
2022-06-30	2163
2022-09-30	2183
2022-12-31	2044
2023-03-31	2276
2023-06-30	2630
2023-09-30	2016