Quarter	US dollars
1999-09-30	9717
1999-12-31	9834
2000-03-31	9503
2000-06-30	10833
2000-09-30	12211
2000-12-31	12830
2001-03-31	15063
2001-06-30	13211
2001-09-30	16822
2001-12-31	17540
2002-03-31	14479
2002-06-30	22022
2002-09-30	28176
2002-12-31	31964
2003-03-31	34334
2003-06-30	40642
2003-09-30	36745
2003-12-31	35712
2004-03-31	37986
2004-06-30	30013
2004-09-30	34684
2004-12-31	41286
2005-03-31	39192
2005-06-30	53257
2005-09-30	50641
2005-12-31	45964
2006-03-31	40452
2006-06-30	45782
2006-09-30	37340
2006-12-31	35747
2007-03-31	48715
2007-06-30	68785
2007-09-30	71816
2007-12-31	74943
2008-03-31	136537
2008-06-30	150352
2008-09-30	124866
2008-12-31	190859
2009-03-31	140193
2009-06-30	124436
2009-09-30	130631
2009-12-31	108949
2010-03-31	114367
2010-06-30	129676
2010-09-30	147465
2010-12-31	111316
2011-03-31	85937
2011-06-30	101431
2011-09-30	144528
2011-12-31	142781
2012-03-31	142084
2012-06-30	139172
2012-09-30	96573
2012-12-31	96276
2013-03-31	88203
2013-06-30	72752
2013-09-30	70437
2013-12-31	66626
2014-03-31	72142
2014-06-30	85264
2014-09-30	91860
2014-12-31	101516
2015-03-31	110163
2015-06-30	85357
2015-09-30	86239
2015-12-31	77637
2016-03-31	90558
2016-06-30	92541
2016-09-30	88956
2016-12-31	69946
2017-03-31	66637
2017-06-30	63546
2017-09-30	62547
2017-12-31	64702
2018-03-31	66880
2018-06-30	41543
2018-09-30	49168
2018-12-31	58694
2019-03-31	63826
2019-06-30	68239
2019-09-30	91178
2019-12-31	70473
2020-03-31	85989
2020-06-30	86522
2020-09-30	89499
2020-12-31	92285
2021-03-31	73582
2021-06-30	67385
2021-09-30	64397
2021-12-31	53322
2022-03-31	46746
2022-06-30	38537
2022-09-30	40678
2022-12-31	35468
2023-03-31	32411
2023-06-30	31311
2023-09-30	31510