Quarter	US dollars
1999-09-30	26170
1999-12-31	25230
2000-03-31	27769
2000-06-30	30609
2000-09-30	29090
2000-12-31	29549
2001-03-31	29655
2001-06-30	30784
2001-09-30	31005
2001-12-31	32163
2002-03-31	36363
2002-06-30	37560
2002-09-30	37128
2002-12-31	36530
2003-03-31	41878
2003-06-30	46832
2003-09-30	44791
2003-12-31	45148
2004-03-31	45218
2004-06-30	48983
2004-09-30	52901
2004-12-31	54389
2005-03-31	54326
2005-06-30	55953
2005-09-30	59288
2005-12-31	59466
2006-03-31	63738
2006-06-30	70473
2006-09-30	74158
2006-12-31	72317
2007-03-31	76818
2007-06-30	80804
2007-09-30	83597
2007-12-31	88724
2008-03-31	93935
2008-06-30	91980
2008-09-30	90440
2008-12-31	72536
2009-03-31	71613
2009-06-30	77115
2009-09-30	83707
2009-12-31	85292
2010-03-31	89029
2010-06-30	83313
2010-09-30	80673
2010-12-31	87156
2011-03-31	92123
2011-06-30	98428
2011-09-30	89321
2011-12-31	89869
2012-03-31	95525
2012-06-30	96416
2012-09-30	101380
2012-12-31	100413
2013-03-31	103512
2013-06-30	93662
2013-09-30	97893
2013-12-31	95046
2014-03-31	90023
2014-06-30	91062
2014-09-30	85429
2014-12-31	90370
2015-03-31	82327
2015-06-30	86818
2015-09-30	82126
2015-12-31	83674
2016-03-31	86397
2016-06-30	84207
2016-09-30	85256
2016-12-31	84288
2017-03-31	85469
2017-06-30	85722
2017-09-30	84982
2017-12-31	91961
2018-03-31	94389
2018-06-30	96330
2018-09-30	99063
2018-12-31	96689
2019-03-31	97038
2019-06-30	100218
2019-09-30	101803
2019-12-31	102090
2020-03-31	105925
2020-06-30	117322
2020-09-30	118611
2020-12-31	127398
2021-03-31	121853
2021-06-30	129723
2021-09-30	131040
2021-12-31	136274
2022-03-31	135475
2022-06-30	132464
2022-09-30	128285
2022-12-31	132702
2023-03-31	126323
2023-06-30	128911
2023-09-30	130699