Quarter	US dollars
2004-12-31	1378
2005-03-31	1514
2005-06-30	1610
2005-09-30	1712
2005-12-31	1926
2006-03-31	2151
2006-06-30	2417
2006-09-30	2472
2006-12-31	2254
2007-03-31	2454
2007-06-30	2705
2007-09-30	3125
2007-12-31	3239
2008-03-31	3683
2008-06-30	4090
2008-09-30	4596
2008-12-31	4178
2009-03-31	4003
2009-06-30	4163
2009-09-30	4264
2009-12-31	4342
2010-03-31	4341
2010-06-30	4526
2010-09-30	4786
2010-12-31	4753
2011-03-31	4588
2011-06-30	4611
2011-09-30	4583
2011-12-31	4590
2012-03-31	4978
2012-06-30	4946
2012-09-30	5055
2012-12-31	4710
2013-03-31	4682
2013-06-30	4386
2013-09-30	4533
2013-12-31	4327
2014-03-31	4425
2014-06-30	4462
2014-09-30	4191
2014-12-31	4284
2015-03-31	4114
2015-06-30	4381
2015-09-30	4543
2015-12-31	4357
2016-03-31	3996
2016-06-30	4225
2016-09-30	3830
2016-12-31	3061
2017-03-31	3456
2017-06-30	3088
2017-09-30	2846
2017-12-31	2928
2018-03-31	2776
2018-06-30	2849
2018-09-30	3048
2018-12-31	3293
2019-03-31	3515
2019-06-30	3944
2019-09-30	3462
2019-12-31	3748
2020-03-31	3438
2020-06-30	3640
2020-09-30	3528
2020-12-31	3461
2021-03-31	3482
2021-06-30	3596
2021-09-30	3600
2021-12-31	3373
2022-03-31	3204
2022-06-30	3259
2022-09-30	3082
2022-12-31	2745
2023-03-31	2611
2023-06-30	2662
2023-09-30	2717