Quarter	US dollars
1999-03-31	122812
1999-06-30	118974
1999-09-30	116856
1999-12-31	112548
2000-03-31	114941
2000-06-30	110343
2000-09-30	110271
2000-12-31	108690
2001-03-31	105869
2001-06-30	104974
2001-09-30	103476
2001-12-31	100454
2002-03-31	106775
2002-06-30	110102
2002-09-30	109504
2002-12-31	111625
2003-03-31	117375
2003-06-30	115298
2003-09-30	127006
2003-12-31	131282
2004-03-31	155418
2004-06-30	152232
2004-09-30	162857
2004-12-31	174479
2005-03-31	183535
2005-06-30	176972
2005-09-30	199668
2005-12-31	202753
2006-03-31	247197
2006-06-30	240435
2006-09-30	269589
2006-12-31	259021
2007-03-31	299233
2007-06-30	340258
2007-09-30	356178
2007-12-31	383547
2008-03-31	423943
2008-06-30	403026
2008-09-30	390472
2008-12-31	334148
2009-03-31	312112
2009-06-30	321357
2009-09-30	317771
2009-12-31	321564
2010-03-31	339431
2010-06-30	347543
2010-09-30	371508
2010-12-31	369640
2011-03-31	404467
2011-06-30	421024
2011-09-30	392905
2011-12-31	394492
2012-03-31	404764
2012-06-30	392784
2012-09-30	402746
2012-12-31	413757
2013-03-31	450263
2013-06-30	443358
2013-09-30	451860
2013-12-31	445155
2014-03-31	463339
2014-06-30	456408
2014-09-30	443273
2014-12-31	419166
2015-03-31	411605
2015-06-30	419080
2015-09-30	407012
2015-12-31	404611
2016-03-31	379771
2016-06-30	385274
2016-09-30	379623
2016-12-31	367057
2017-03-31	380423
2017-06-30	381971
2017-09-30	406346
2017-12-31	427777
2018-03-31	436983
2018-06-30	408525
2018-09-30	416410
2018-12-31	425984
2019-03-31	441511
2019-06-30	440513
2019-09-30	424523
2019-12-31	443554
2020-03-31	435443
2020-06-30	404108
2020-09-30	411971
2020-12-31	444958
2021-03-31	438334
2021-06-30	429936
2021-09-30	427120
2021-12-31	460998
2022-03-31	451369
2022-06-30	437369
2022-09-30	457521
2022-12-31	452752
2023-03-31	446512
2023-06-30	445265
2023-09-30	436592