Quarter	US dollars
1986-09-30	261000
1986-12-31	281000
1987-03-31	297000
1987-06-30	302000
1987-09-30	319000
1987-12-31	342000
1988-03-31	340000
1988-06-30	330000
1988-09-30	347000
1988-12-31	351000
1989-03-31	343000
1989-06-30	323000
1989-09-30	342000
1989-12-31	349000
1990-03-31	333000
1990-06-30	329000
1990-09-30	353000
1990-12-31	363000
1991-03-31	317000
1991-06-30	306000
1991-09-30	301000
1991-12-31	305000
1992-03-31	268000
1992-06-30	266000
1992-09-30	258000
1992-12-31	248000
1993-03-31	228000
1993-06-30	223000
1993-09-30	227000
1993-12-31	245000
1994-03-31	239000
1994-06-30	245000
1994-09-30	254000
1994-12-31	266000
1995-03-31	266000
1995-06-30	259000
1995-09-30	253000
1995-12-31	243000
1996-03-31	221000
1996-06-30	215000
1996-09-30	210000
1996-12-31	213000
1997-03-31	215000
1997-06-30	220000
1997-09-30	211000
1997-12-31	204000
1998-03-31	177000
1998-06-30	164000
1998-09-30	165000
1998-12-31	158000
1999-03-31	138089
1999-06-30	124740
1999-09-30	132521
1999-12-31	133076
2000-03-31	137419
2000-06-30	152033
2000-09-30	147271
2000-12-31	164202
2001-03-31	164012
2001-06-30	160842
2001-09-30	166431
2001-12-31	149884
2002-03-31	133554
2002-06-30	138539
2002-09-30	148672
2002-12-31	175219
2003-03-31	146754
2003-06-30	146725
2003-09-30	138800
2003-12-31	138203
2004-03-31	147466
2004-06-30	139851
2004-09-30	153736
2004-12-31	156706
2005-03-31	124891
2005-06-30	153762
2005-09-30	152269
2005-12-31	151413
2006-03-31	138964
2006-06-30	150585
2006-09-30	149649
2006-12-31	144533
2007-03-31	152435
2007-06-30	171139
2007-09-30	173614
2007-12-31	198047
2008-03-31	198705
2008-06-30	203293
2008-09-30	187230
2008-12-31	194877
2009-03-31	169626
2009-06-30	216696
2009-09-30	216096
2009-12-31	203255
2010-03-31	187108
2010-06-30	176340
2010-09-30	186518
2010-12-31	181407
2011-03-31	196867
2011-06-30	201785
2011-09-30	201778
2011-12-31	216651
2012-03-31	226933
2012-06-30	237809
2012-09-30	256210
2012-12-31	268842
2013-03-31	279596
2013-06-30	260973
2013-09-30	274589
2013-12-31	277492
2014-03-31	259825
2014-06-30	271407
2014-09-30	245755
2014-12-31	266364
2015-03-31	241554
2015-06-30	251320
2015-09-30	261478
2015-12-31	285014
2016-03-31	268343
2016-06-30	290536
2016-09-30	295473
2016-12-31	284986
2017-03-31	289124
2017-06-30	285749
2017-09-30	306334
2017-12-31	318336
2018-03-31	327944
2018-06-30	307508
2018-09-30	314267
2018-12-31	328518
2019-03-31	322574
2019-06-30	327298
2019-09-30	321635
2019-12-31	334407
2020-03-31	337793
2020-06-30	322759
2020-09-30	329391
2020-12-31	352434
2021-03-31	336212
2021-06-30	345561
2021-09-30	325866
2021-12-31	335608
2022-03-31	336003
2022-06-30	327500
2022-09-30	330275
2022-12-31	350676
2023-03-31	318137
2023-06-30	307884
2023-09-30	317898