Quarter	US dollars
1986-09-30	1347
1986-12-31	1622
1987-03-31	1594
1987-06-30	1591
1987-09-30	1706
1987-12-31	1424
1988-03-31	1637
1988-06-30	1335
1988-09-30	1275
1988-12-31	1324
1989-03-31	1101
1989-06-30	1132
1989-09-30	1092
1989-12-31	958
1990-03-31	917
1990-06-30	1172
1990-09-30	1242
1990-12-31	1167
1991-03-31	1116
1991-06-30	1065
1991-09-30	1049
1991-12-31	1056
1992-03-31	1051
1992-06-30	1015
1992-09-30	964
1992-12-31	1027
1993-03-31	915
1993-06-30	869
1993-09-30	842
1993-12-31	1050
1994-03-31	802
1994-06-30	759
1994-09-30	660
1994-12-31	663
1995-03-31	658
1995-06-30	678
1995-09-30	625
1995-12-31	671
1996-03-31	959
1996-06-30	1242
1996-09-30	1212
1996-12-31	1228
1997-03-31	1504
1997-06-30	2006
1997-09-30	2488
1997-12-31	1965
1998-03-31	1607
1998-06-30	3108
1998-09-30	1657
1998-12-31	3119
1999-03-31	3017
1999-06-30	3100
1999-09-30	2133
1999-12-31	2464
2000-03-31	2388
2000-06-30	1751
2000-09-30	1722
2000-12-31	1678
2001-03-31	1600
2001-06-30	1752
2001-09-30	1450
2001-12-31	1373
2002-03-31	2077
2002-06-30	1606
2002-09-30	1559
2002-12-31	1761
2003-03-31	2150
2003-06-30	2635
2003-09-30	2859
2003-12-31	3174
2004-03-31	2376
2004-06-30	2014
2004-09-30	2461
2004-12-31	2373
2005-03-31	2233
2005-06-30	2144
2005-09-30	2394
2005-12-31	2360
2006-03-31	2639
2006-06-30	2796
2006-09-30	2598
2006-12-31	2939
2007-03-31	2804
2007-06-30	2745
2007-09-30	2432
2007-12-31	3575
2008-03-31	2819
2008-06-30	2551
2008-09-30	1838
2008-12-31	1893
2009-03-31	1696
2009-06-30	1786
2009-09-30	1866
2009-12-31	1536
2010-03-31	1647
2010-06-30	1583
2010-09-30	1982
2010-12-31	2534
2011-03-31	2701
2011-06-30	2749
2011-09-30	2786
2011-12-31	3218
2012-03-31	3328
2012-06-30	3664
2012-09-30	3747
2012-12-31	3720
2013-03-31	5074
2013-06-30	3350
2013-09-30	3259
2013-12-31	4814
2014-03-31	4079
2014-06-30	4216
2014-09-30	3739
2014-12-31	4740
2015-03-31	3555
2015-06-30	3140
2015-09-30	2942
2015-12-31	2998
2016-03-31	1871
2016-06-30	2028
2016-09-30	1652
2016-12-31	2952
2017-03-31	1777
2017-06-30	2604
2017-09-30	2399
2017-12-31	3253
2018-03-31	2306
2018-06-30	2232
2018-09-30	1384
2018-12-31	3047
2019-03-31	3134
2019-06-30	3756
2019-09-30	3095
2019-12-31	3362
2020-03-31	3262
2020-06-30	2552
2020-09-30	1705
2020-12-31	4503
2021-03-31	2533
2021-06-30	2282
2021-09-30	2082
2021-12-31	2469
2022-03-31	3284
2022-06-30	3095
2022-09-30	4556
2022-12-31	3528
2023-03-31	4081
2023-06-30	4374
2023-09-30	3369