Quarter	US dollars
1999-09-30	5505
1999-12-31	5641
2000-03-31	5972
2000-06-30	5787
2000-09-30	8679
2000-12-31	9152
2001-03-31	9070
2001-06-30	8874
2001-09-30	9005
2001-12-31	9033
2002-03-31	9346
2002-06-30	9393
2002-09-30	9638
2002-12-31	10175
2003-03-31	11340
2003-06-30	11960
2003-09-30	13492
2003-12-31	14159
2004-03-31	15223
2004-06-30	14740
2004-09-30	14320
2004-12-31	15943
2005-03-31	17159
2005-06-30	11544
2005-09-30	19276
2005-12-31	18599
2006-03-31	21482
2006-06-30	22479
2006-09-30	22783
2006-12-31	26167
2007-03-31	30114
2007-06-30	33362
2007-09-30	37747
2007-12-31	45064
2008-03-31	49328
2008-06-30	50807
2008-09-30	52182
2008-12-31	46087
2009-03-31	45292
2009-06-30	47224
2009-09-30	52377
2009-12-31	52539
2010-03-31	57641
2010-06-30	71379
2010-09-30	75432
2010-12-31	76686
2011-03-31	78853
2011-06-30	78755
2011-09-30	78272
2011-12-31	72328
2012-03-31	74805
2012-06-30	73931
2012-09-30	74418
2012-12-31	73771
2013-03-31	76570
2013-06-30	70134
2013-09-30	68284
2013-12-31	67104
2014-03-31	67054
2014-06-30	66135
2014-09-30	66688
2014-12-31	63701
2015-03-31	65656
2015-06-30	60412
2015-09-30	58596
2015-12-31	55742
2016-03-31	61176
2016-06-30	58657
2016-09-30	63831
2016-12-31	54898
2017-03-31	57598
2017-06-30	66727
2017-09-30	66297
2017-12-31	66254
2018-03-31	69896
2018-06-30	69700
2018-09-30	66291
2018-12-31	68635
2019-03-31	73021
2019-06-30	72707
2019-09-30	70213
2019-12-31	64687
2020-03-31	67849
2020-06-30	64542
2020-09-30	65292
2020-12-31	67273
2021-03-31	70943
2021-06-30	72598
2021-09-30	74317
2021-12-31	81338
2022-03-31	76929
2022-06-30	80120
2022-09-30	79204
2022-12-31	79523
2023-03-31	81724
2023-06-30	85506
2023-09-30	88777