Quarter	US dollars
1986-09-30	34714
1986-12-31	51216
1987-03-31	62886
1987-06-30	62217
1987-09-30	64055
1987-12-31	73020
1988-03-31	74906
1988-06-30	69922
1988-09-30	68758
1988-12-31	85808
1989-03-31	79436
1989-06-30	73102
1989-09-30	83877
1989-12-31	86382
1990-03-31	88924
1990-06-30	96737
1990-09-30	105376
1990-12-31	100297
1991-03-31	113744
1991-06-30	106435
1991-09-30	100169
1991-12-31	104357
1992-03-31	95185
1992-06-30	94288
1992-09-30	103299
1992-12-31	102239
1993-03-31	99137
1993-06-30	107107
1993-09-30	106233
1993-12-31	106556
1994-03-31	110506
1994-06-30	119610
1994-09-30	126854
1994-12-31	136416
1995-03-31	190630
1995-06-30	189995
1995-09-30	192488
1995-12-31	192933
1996-03-31	200352
1996-06-30	202578
1996-09-30	211583
1996-12-31	231518
1997-03-31	239467
1997-06-30	257597
1997-09-30	160885
1997-12-31	162905
1998-03-31	162496
1998-06-30	168475
1998-09-30	192989
1998-12-31	174148
1999-03-31	259202
1999-06-30	297809
1999-09-30	243712
1999-12-31	207432
2000-03-31	236603
2000-06-30	255671
2000-09-30	246529
2000-12-31	244697
2001-03-31	264119
2001-06-30	256893
2001-09-30	267738
2001-12-31	277189
2002-03-31	286754
2002-06-30	302714
2002-09-30	322597
2002-12-31	355096
2003-03-31	356539
2003-06-30	374533
2003-09-30	419766
2003-12-31	464230
2004-03-31	511830
2004-06-30	523855
2004-09-30	534220
2004-12-31	554547
2005-03-31	555293
2005-06-30	544415
2005-09-30	569418
2005-12-31	565595
2006-03-31	628534
2006-06-30	698605
2006-09-30	776050
2006-12-31	801998
2007-03-31	884419
2007-06-30	976335
2007-09-30	1081816
2007-12-31	1107250
2008-03-31	1238336
2008-06-30	1171502
2008-09-30	1129343
2008-12-31	1006891
2009-03-31	1080178
2009-06-30	1186209
2009-09-30	1271319
2009-12-31	1273259
2010-03-31	1225229
2010-06-30	1108537
2010-09-30	1235743
2010-12-31	1174314
2011-03-31	1227896
2011-06-30	1228860
2011-09-30	1114147
2011-12-31	1069738
2012-03-31	1102643
2012-06-30	1050157
2012-09-30	1049224
2012-12-31	1036054
2013-03-31	976627
2013-06-30	921071
2013-09-30	946519
2013-12-31	935144
2014-03-31	942493
2014-06-30	972428
2014-09-30	948539
2014-12-31	905138
2015-03-31	885836
2015-06-30	914346
2015-09-30	920056
2015-12-31	857449
2016-03-31	865266
2016-06-30	867003
2016-09-30	884197
2016-12-31	824567
2017-03-31	848749
2017-06-30	884830
2017-09-30	932135
2017-12-31	937363
2018-03-31	991739
2018-06-30	969822
2018-09-30	967448
2018-12-31	960478
2019-03-31	945344
2019-06-30	965799
2019-09-30	1005369
2019-12-31	1003601