Quarter	US dollars
2004-12-31	1071
2005-03-31	1028
2005-06-30	1117
2005-09-30	1143
2005-12-31	1152
2006-03-31	1159
2006-06-30	1287
2006-09-30	1315
2006-12-31	1376
2007-03-31	1400
2007-06-30	1579
2007-09-30	1581
2007-12-31	1625
2008-03-31	1777
2008-06-30	1855
2008-09-30	2103
2008-12-31	2053
2009-03-31	1862
2009-06-30	1973
2009-09-30	1870
2009-12-31	2065
2010-03-31	2178
2010-06-30	2442
2010-09-30	2636
2010-12-31	2834
2011-03-31	2845
2011-06-30	3038
2011-09-30	3096
2011-12-31	2998
2012-03-31	3244
2012-06-30	3522
2012-09-30	3579
2012-12-31	4027
2013-03-31	4261
2013-06-30	4643
2013-09-30	4552
2013-12-31	4441
2014-03-31	5084
2014-06-30	4970
2014-09-30	5099
2014-12-31	5185
2015-03-31	5098
2015-06-30	5516
2015-09-30	5144
2015-12-31	5124
2016-03-31	4998
2016-06-30	5686
2016-09-30	5647
2016-12-31	5819
2017-03-31	5137
2017-06-30	5957
2017-09-30	6037
2017-12-31	5962
2018-03-31	6131
2018-06-30	6433
2018-09-30	6594
2018-12-31	6819
2019-03-31	6975
2019-06-30	7264
2019-09-30	6791
2019-12-31	6859
2020-03-31	7170
2020-06-30	7104
2020-09-30	6691
2020-12-31	6691
2021-03-31	6865
2021-06-30	7247
2021-09-30	7296
2021-12-31	7341
2022-03-31	7444
2022-06-30	7181
2022-09-30	6641
2022-12-31	7056
2023-03-31	6877
2023-06-30	7072
2023-09-30	6485