Quarter	US dollars
1986-09-30	966
1986-12-31	1055
1987-03-31	1250
1987-06-30	1339
1987-09-30	1304
1987-12-31	1388
1988-03-31	1532
1988-06-30	1565
1988-09-30	1609
1988-12-31	1837
1989-03-31	1774
1989-06-30	1801
1989-09-30	1914
1989-12-31	1978
1990-03-31	1832
1990-06-30	1789
1990-09-30	1750
1990-12-31	1637
1991-03-31	1409
1991-06-30	1222
1991-09-30	1170
1991-12-31	1289
1992-03-31	1146
1992-06-30	1148
1992-09-30	1178
1992-12-31	1074
1993-03-31	1026
1993-06-30	956
1993-09-30	974
1993-12-31	945
1994-03-31	930
1994-06-30	561
1994-09-30	448
1994-12-31	238
1995-03-31	287
1995-06-30	191
1995-09-30	211
1995-12-31	275
1996-03-31	225
1996-06-30	218
1996-09-30	195
1996-12-31	229
1997-03-31	198
1997-06-30	253
1997-09-30	316
1997-12-31	326
1998-03-31	338
1998-06-30	201
1998-09-30	139
1998-12-31	210
1999-03-31	152
1999-06-30	148
1999-09-30	152
1999-12-31	164
2000-03-31	203
2000-06-30	110
2000-09-30	150
2000-12-31	139
2001-03-31	153
2001-06-30	170
2001-09-30	186
2001-12-31	215
2002-03-31	275
2002-06-30	215
2002-09-30	271
2002-12-31	319
2003-03-31	329
2003-06-30	357
2003-09-30	257
2003-12-31	322
2004-03-31	484
2004-06-30	530
2004-09-30	799
2004-12-31	847
2005-03-31	790
2005-06-30	855
2005-09-30	752
2005-12-31	648
2006-03-31	668
2006-06-30	1133
2006-09-30	1254
2006-12-31	1648
2007-03-31	1336
2007-06-30	1410
2007-09-30	1421
2007-12-31	1551
2008-03-31	1892
2008-06-30	2251
2008-09-30	2350
2008-12-31	2420
2009-03-31	2293
2009-06-30	2411
2009-09-30	2294
2009-12-31	2341
2010-03-31	2239
2010-06-30	1969
2010-09-30	1885
2010-12-31	1784
2011-03-31	1938
2011-06-30	1924
2011-09-30	1638
2011-12-31	1779
2012-03-31	1628
2012-06-30	1349
2012-09-30	1466
2012-12-31	1315
2013-03-31	1038
2013-06-30	1140
2013-09-30	1045
2013-12-31	709
2014-03-31	623
2014-06-30	698
2014-09-30	857
2014-12-31	1456
2015-03-31	550
2015-06-30	761
2015-09-30	695
2015-12-31	667
2016-03-31	771
2016-06-30	732
2016-09-30	658
2016-12-31	604
2017-03-31	426
2017-06-30	452
2017-09-30	437
2017-12-31	478
2018-03-31	365
2018-06-30	333
2018-09-30	360
2018-12-31	315
2019-03-31	242
2019-06-30	276
2019-09-30	205
2019-12-31	241
2020-03-31	229
2020-06-30	123
2020-09-30	130
2020-12-31	275
2021-03-31	225
2021-06-30	152
2021-09-30	168
2021-12-31	141
2022-03-31	173
2022-06-30	153
2022-09-30	218
2022-12-31	158
2023-03-31	189
2023-06-30	116
2023-09-30	123