Quarter	US dollars
1986-09-30	95
1986-12-31	78
1987-03-31	60
1987-06-30	55
1987-09-30	62
1987-12-31	69
1988-03-31	55
1988-06-30	60
1988-09-30	55
1988-12-31	53
1989-03-31	62
1989-06-30	74
1989-09-30	68
1989-12-31	74
1990-03-31	75
1990-06-30	80
1990-09-30	94
1990-12-31	96
1991-03-31	85
1991-06-30	166
1991-09-30	358
1991-12-31	422
1992-03-31	382
1992-06-30	618
1992-09-30	831
1992-12-31	915
1993-03-31	1024
1993-06-30	54
1993-09-30	59
1993-12-31	52
1994-03-31	103
1994-06-30	98
1994-09-30	104
1994-12-31	78
1995-03-31	67
1995-06-30	89
1995-09-30	63
1995-12-31	69
1996-03-31	53
1996-06-30	62
1996-09-30	103
1996-12-31	69
1997-03-31	51
1997-06-30	57
1997-09-30	100
1997-12-31	91
1998-03-31	1277
1998-06-30	1283
1998-09-30	1512
1998-12-31	2050
1999-03-31	2925
1999-06-30	2497
1999-09-30	2647
1999-12-31	2543
2000-03-31	3013
2000-06-30	4002
2000-09-30	2810
2000-12-31	2705
2001-03-31	2915
2001-06-30	2736
2001-09-30	3130
2001-12-31	4159
2002-03-31	2809
2002-06-30	4012
2002-09-30	2860
2002-12-31	2829
2003-03-31	3631
2003-06-30	2756
2003-09-30	2889
2003-12-31	3244
2004-03-31	2855
2004-06-30	2402
2004-09-30	2763
2004-12-31	2713
2005-03-31	3537
2005-06-30	2126
2005-09-30	2330
2005-12-31	3012
2006-03-31	3452
2006-06-30	3853
2006-09-30	3411
2006-12-31	3506
2007-03-31	3481
2007-06-30	3506
2007-09-30	3021
2007-12-31	3949
2008-03-31	5530
2008-06-30	5704
2008-09-30	3966
2008-12-31	936
2009-03-31	1266
2009-06-30	1741
2009-09-30	1751
2009-12-31	489
2010-03-31	1815
2010-06-30	2611
2010-09-30	1934
2010-12-31	1402
2011-03-31	1414
2011-06-30	1227
2011-09-30	1509
2011-12-31	2396
2012-03-31	2159
2012-06-30	1371
2012-09-30	1693
2012-12-31	2144
2013-03-31	3054
2013-06-30	2926
2013-09-30	1930
2013-12-31	1232
2014-03-31	2012
2014-06-30	1153
2014-09-30	1285
2014-12-31	2488
2015-03-31	1526
2015-06-30	1509
2015-09-30	2837
2015-12-31	2172
2016-03-31	3515
2016-06-30	3418
2016-09-30	3496
2016-12-31	4888
2017-03-31	6063
2017-06-30	2972
2017-09-30	3003
2017-12-31	2378
2018-03-31	3262
2018-06-30	3083
2018-09-30	3606
2018-12-31	4081
2019-03-31	3764
2019-06-30	2664
2019-09-30	3945
2019-12-31	4315
2020-03-31	4324
2020-06-30	4955
2020-09-30	4292
2020-12-31	6646
2021-03-31	6588
2021-06-30	4315
2021-09-30	5070
2021-12-31	4533
2022-03-31	5679
2022-06-30	4005
2022-09-30	3643
2022-12-31	5141
2023-03-31	3961
2023-06-30	3911
2023-09-30	3797