Quarter	US dollars
2004-12-31	9336
2005-03-31	9966
2005-06-30	10959
2005-09-30	12969
2005-12-31	12190
2006-03-31	16405
2006-06-30	13843
2006-09-30	14843
2006-12-31	14439
2007-03-31	19423
2007-06-30	21186
2007-09-30	25563
2007-12-31	33011
2008-03-31	36280
2008-06-30	38727
2008-09-30	37797
2008-12-31	33743
2009-03-31	36164
2009-06-30	34008
2009-09-30	29574
2009-12-31	28083
2010-03-31	28341
2010-06-30	32113
2010-09-30	35731
2010-12-31	35078
2011-03-31	35827
2011-06-30	37428
2011-09-30	39873
2011-12-31	39104
2012-03-31	38438
2012-06-30	37127
2012-09-30	38008
2012-12-31	39334
2013-03-31	39817
2013-06-30	39020
2013-09-30	38200
2013-12-31	39110
2014-03-31	43750
2014-06-30	43344
2014-09-30	42328
2014-12-31	40191
2015-03-31	39397
2015-06-30	38555
2015-09-30	37449
2015-12-31	36917
2016-03-31	36665
2016-06-30	36178
2016-09-30	33888
2016-12-31	33864
2017-03-31	34566
2017-06-30	31610
2017-09-30	30275
2017-12-31	32306
2018-03-31	31486
2018-06-30	31080
2018-09-30	30959
2018-12-31	30555
2019-03-31	32145
2019-06-30	32622
2019-09-30	31548
2019-12-31	33379
2020-03-31	31579
2020-06-30	34425
2020-09-30	32621
2020-12-31	34047
2021-03-31	32410
2021-06-30	32343
2021-09-30	34542
2021-12-31	35939
2022-03-31	37346
2022-06-30	32973
2022-09-30	30819
2022-12-31	30168
2023-03-31	31775
2023-06-30	31139
2023-09-30	30418