Quarter	US dollars
1999-09-30	12225
1999-12-31	12226
2000-03-31	14933
2000-06-30	15333
2000-09-30	15009
2000-12-31	17508
2001-03-31	16725
2001-06-30	17680
2001-09-30	16997
2001-12-31	15853
2002-03-31	14580
2002-06-30	11817
2002-09-30	9954
2002-12-31	9704
2003-03-31	9520
2003-06-30	9163
2003-09-30	9166
2003-12-31	9468
2004-03-31	10048
2004-06-30	9959
2004-09-30	11868
2004-12-31	13178
2005-03-31	15267
2005-06-30	18834
2005-09-30	21434
2005-12-31	19980
2006-03-31	22536
2006-06-30	23058
2006-09-30	24535
2006-12-31	29134
2007-03-31	31873
2007-06-30	35662
2007-09-30	37433
2007-12-31	42271
2008-03-31	48103
2008-06-30	55293
2008-09-30	52242
2008-12-31	41593
2009-03-31	41735
2009-06-30	49687
2009-09-30	58721
2009-12-31	57592
2010-03-31	62433
2010-06-30	62362
2010-09-30	76552
2010-12-31	79532
2011-03-31	79384
2011-06-30	94409
2011-09-30	80593
2011-12-31	80025
2012-03-31	83595
2012-06-30	73991
2012-09-30	73060
2012-12-31	69393
2013-03-31	73584
2013-06-30	62817
2013-09-30	74658
2013-12-31	68918
2014-03-31	73555
2014-06-30	72312
2014-09-30	71962
2014-12-31	69437
2015-03-31	64688
2015-06-30	60448
2015-09-30	48960
2015-12-31	44853
2016-03-31	49352
2016-06-30	52224
2016-09-30	13111
2016-12-31	11981
2017-03-31	12199
2017-06-30	11291
2017-09-30	12610
2017-12-31	11655
2018-03-31	12087
2018-06-30	10815
2018-09-30	12298
2018-12-31	13496
2019-03-31	15102
2019-06-30	14879
2019-09-30	19881
2019-12-31	16812
2020-03-31	12511
2020-06-30	10739
2020-09-30	10250
2020-12-31	15707
2021-03-31	15693
2021-06-30	15468
2021-09-30	15112
2021-12-31	30666
2022-03-31	24338
2022-06-30	11700
2022-09-30	28593
2022-12-31	30721
2023-03-31	32903
2023-06-30	32922
2023-09-30	17042