Quarter	US dollars
1986-09-30	124000
1986-12-31	125000
1987-03-31	129000
1987-06-30	131000
1987-09-30	134000
1987-12-31	146000
1988-03-31	142000
1988-06-30	140000
1988-09-30	144000
1988-12-31	139000
1989-03-31	144000
1989-06-30	141000
1989-09-30	147000
1989-12-31	143000
1990-03-31	143000
1990-06-30	146000
1990-09-30	152000
1990-12-31	153000
1991-03-31	143000
1991-06-30	134000
1991-09-30	143000
1991-12-31	149000
1992-03-31	146000
1992-06-30	156000
1992-09-30	173000
1992-12-31	162000
1993-03-31	183000
1993-06-30	184000
1993-09-30	189000
1993-12-31	202000
1994-03-31	195000
1994-06-30	204000
1994-09-30	215000
1994-12-31	210000
1995-03-31	224000
1995-06-30	222000
1995-09-30	218000
1995-12-31	218000
1996-03-31	222000
1996-06-30	221000
1996-09-30	231000
1996-12-31	230000
1997-03-31	244000
1997-06-30	258000
1997-09-30	279000
1997-12-31	326000
1998-03-31	332000
1998-06-30	341000
1998-09-30	353000
1998-12-31	324000
1999-03-31	380891
1999-06-30	427435
1999-09-30	388944
1999-12-31	353392
2000-03-31	392097
2000-06-30	407943
2000-09-30	402611
2000-12-31	412425
2001-03-31	434107
2001-06-30	428140
2001-09-30	467530
2001-12-31	498429
2002-03-31	501014
2002-06-30	531068
2002-09-30	566365
2002-12-31	595245
2003-03-31	646498
2003-06-30	681942
2003-09-30	711589
2003-12-31	723455
2004-03-31	826056
2004-06-30	798907
2004-09-30	910833
2004-12-31	905078
2005-03-31	995974
2005-06-30	979600
2005-09-30	1128273
2005-12-31	1050580
2006-03-31	1189397
2006-06-30	1183555
2006-09-30	1316968
2006-12-31	1348551
2007-03-31	1562821
2007-06-30	1640049
2007-09-30	1917731
2007-12-31	1879039
2008-03-31	2141877
2008-06-30	1931193
2008-09-30	2094995
2008-12-31	1730850
2009-03-31	1684161
2009-06-30	1708696
2009-09-30	1751831
2009-12-31	1752027
2010-03-31	1865373
2010-06-30	1933875
2010-09-30	2118392
2010-12-31	2022180
2011-03-31	2209476
2011-06-30	2191358
2011-09-30	2175968
2011-12-31	2081061
2012-03-31	2206856
2012-06-30	2191610
2012-09-30	2167068
2012-12-31	2084785
2013-03-31	1984429
2013-06-30	1959854
2013-09-30	1827587
2013-12-31	1760957
2014-03-31	1793117
2014-06-30	1758329
2014-09-30	1696080
2014-12-31	1573067
2015-03-31	1527597
2015-06-30	1493288
2015-09-30	1464273
2015-12-31	1426124
2016-03-31	1458112
2016-06-30	1492652
2016-09-30	1419527
2016-12-31	1300827
2017-03-31	1369938
2017-06-30	1384019
2017-09-30	1466685
2017-12-31	1536333
2018-03-31	1611375
2018-06-30	1467624
2018-09-30	1495389
2018-12-31	1489809
2019-03-31	1513314
2019-06-30	1524450
2019-09-30	1515942
2019-12-31	1518369
2020-03-31	1733639
2020-06-30	1588637
2020-09-30	1603607
2020-12-31	1726357
2021-03-31	1724729
2021-06-30	1722820
2021-09-30	1672913
2021-12-31	1731276
2022-03-31	1802610
2022-06-30	1783958
2022-09-30	1774674
2022-12-31	1772983
2023-03-31	1888193
2023-06-30	1941701
2023-09-30	1908473