Quarter	US dollars
1986-09-30	1062
1986-12-31	1059
1987-03-31	1009
1987-06-30	987
1987-09-30	915
1987-12-31	931
1988-03-31	843
1988-06-30	828
1988-09-30	816
1988-12-31	824
1989-03-31	747
1989-06-30	760
1989-09-30	866
1989-12-31	828
1990-03-31	823
1990-06-30	774
1990-09-30	694
1990-12-31	754
1991-03-31	721
1991-06-30	735
1991-09-30	680
1991-12-31	770
1992-03-31	770
1992-06-30	804
1992-09-30	747
1992-12-31	682
1993-03-31	674
1993-06-30	746
1993-09-30	798
1993-12-31	793
1994-03-31	755
1994-06-30	900
1994-09-30	1011
1994-12-31	936
1995-03-31	815
1995-06-30	809
1995-09-30	809
1995-12-31	793
1996-03-31	904
1996-06-30	929
1996-09-30	901
1996-12-31	846
1997-03-31	993
1997-06-30	1040
1997-09-30	1176
1997-12-31	1120
1998-03-31	1282
1998-06-30	1424
1998-09-30	1304
1998-12-31	1468
1999-03-31	1819
1999-06-30	1715
1999-09-30	1809
1999-12-31	1803
2000-03-31	1860
2000-06-30	1688
2000-09-30	1785
2000-12-31	1759
2001-03-31	1759
2001-06-30	1685
2001-09-30	1674
2001-12-31	1694
2002-03-31	1406
2002-06-30	1346
2002-09-30	1234
2002-12-31	1327
2003-03-31	1230
2003-06-30	1081
2003-09-30	1147
2003-12-31	1099
2004-03-31	1101
2004-06-30	1137
2004-09-30	1138
2004-12-31	1171
2005-03-31	1436
2005-06-30	1869
2005-09-30	1811
2005-12-31	1833
2006-03-31	1527
2006-06-30	1585
2006-09-30	1638
2006-12-31	2027
2007-03-31	1748
2007-06-30	1851
2007-09-30	2058
2007-12-31	2020
2008-03-31	2210
2008-06-30	2466
2008-09-30	2402
2008-12-31	2375
2009-03-31	2298
2009-06-30	2208
2009-09-30	2139
2009-12-31	2088
2010-03-31	2214
2010-06-30	2216
2010-09-30	2268
2010-12-31	2260
2011-03-31	2212
2011-06-30	2247
2011-09-30	2281
2011-12-31	2500
2012-03-31	2442
2012-06-30	2350
2012-09-30	2356
2012-12-31	2212
2013-03-31	2330
2013-06-30	2262
2013-09-30	2201
2013-12-31	2260
2014-03-31	2341
2014-06-30	2058
2014-09-30	2019
2014-12-31	1822
2015-03-31	2266
2015-06-30	2230
2015-09-30	2067
2015-12-31	1815
2016-03-31	2198
2016-06-30	3051
2016-09-30	3013
2016-12-31	3017
2017-03-31	2861
2017-06-30	3167
2017-09-30	4091
2017-12-31	4225
2018-03-31	4347
2018-06-30	4224
2018-09-30	4152
2018-12-31	4393
2019-03-31	4399
2019-06-30	4733
2019-09-30	5017
2019-12-31	4722
2020-03-31	4690
2020-06-30	4465
2020-09-30	4590
2020-12-31	4376
2021-03-31	4235
2021-06-30	4333
2021-09-30	4256
2021-12-31	4067
2022-03-31	4154
2022-06-30	3602
2022-09-30	3595
2022-12-31	3360
2023-03-31	3299
2023-06-30	3125
2023-09-30	3049