Quarter	US dollars
1986-09-30	1074
1986-12-31	928
1987-03-31	1401
1987-06-30	1595
1987-09-30	1401
1987-12-31	1065
1988-03-31	1192
1988-06-30	1158
1988-09-30	1560
1988-12-31	1155
1989-03-31	1305
1989-06-30	1440
1989-09-30	1625
1989-12-31	1670
1990-03-31	1481
1990-06-30	1519
1990-09-30	1663
1990-12-31	1492
1991-03-31	1296
1991-06-30	1248
1991-09-30	1504
1991-12-31	1529
1992-03-31	1829
1992-06-30	1915
1992-09-30	2156
1992-12-31	1899
1993-03-31	2114
1993-06-30	1942
1993-09-30	1811
1993-12-31	1747
1994-03-31	2115
1994-06-30	2262
1994-09-30	2319
1994-12-31	2197
1995-03-31	2207
1995-06-30	2187
1995-09-30	2058
1995-12-31	2390
1996-03-31	2132
1996-06-30	2366
1996-09-30	2509
1996-12-31	3145
1997-03-31	2917
1997-06-30	2814
1997-09-30	2583
1997-12-31	2765
1998-03-31	2672
1998-06-30	2659
1998-09-30	3124
1998-12-31	3142
1999-03-31	2869
1999-06-30	2148
1999-09-30	2296
1999-12-31	1667
2000-03-31	2284
2000-06-30	2738
2000-09-30	2294
2000-12-31	3118
2001-03-31	2380
2001-06-30	2515
2001-09-30	2214
2001-12-31	2092
2002-03-31	2177
2002-06-30	2492
2002-09-30	2420
2002-12-31	2693
2003-03-31	3116
2003-06-30	2970
2003-09-30	2975
2003-12-31	2917
2004-03-31	3088
2004-06-30	3158
2004-09-30	3134
2004-12-31	3402
2005-03-31	2861
2005-06-30	3811
2005-09-30	3586
2005-12-31	3343
2006-03-31	2953
2006-06-30	3218
2006-09-30	3035
2006-12-31	3271
2007-03-31	3789
2007-06-30	3779
2007-09-30	4889
2007-12-31	4709
2008-03-31	5834
2008-06-30	4157
2008-09-30	4454
2008-12-31	3676
2009-03-31	2833
2009-06-30	3285
2009-09-30	3132
2009-12-31	2468
2010-03-31	2033
2010-06-30	2590
2010-09-30	2352
2010-12-31	2527
2011-03-31	2508
2011-06-30	2463
2011-09-30	2518
2011-12-31	1945
2012-03-31	2461
2012-06-30	2327
2012-09-30	2077
2012-12-31	1962
2013-03-31	1903
2013-06-30	1832
2013-09-30	2065
2013-12-31	1673
2014-03-31	1884
2014-06-30	1662
2014-09-30	1934
2014-12-31	1848
2015-03-31	2110
2015-06-30	2162
2015-09-30	1896
2015-12-31	1804
2016-03-31	1750
2016-06-30	1834
2016-09-30	1922
2016-12-31	1861
2017-03-31	1747
2017-06-30	1913
2017-09-30	2240
2017-12-31	1942
2018-03-31	1931
2018-06-30	2072
2018-09-30	1678
2018-12-31	1528
2019-03-31	1879
2019-06-30	1985
2019-09-30	1689
2019-12-31	1861
2020-03-31	1436
2020-06-30	1016
2020-09-30	834
2020-12-31	869
2021-03-31	788
2021-06-30	599
2021-09-30	601
2021-12-31	380
2022-03-31	499
2022-06-30	497
2022-09-30	428
2022-12-31	472
2023-03-31	471
2023-06-30	477
2023-09-30	465