Quarter	US dollars
1986-09-30	341
1986-12-31	375
1987-03-31	412
1987-06-30	459
1987-09-30	564
1987-12-31	579
1988-03-31	648
1988-06-30	690
1988-09-30	777
1988-12-31	933
1989-03-31	1137
1989-06-30	1129
1989-09-30	1147
1989-12-31	1316
1990-03-31	1573
1990-06-30	1711
1990-09-30	2054
1990-12-31	2048
1991-03-31	1823
1991-06-30	1693
1991-09-30	1796
1991-12-31	2026
1992-03-31	1905
1992-06-30	2019
1992-09-30	2110
1992-12-31	1824
1993-03-31	1649
1993-06-30	1517
1993-09-30	1609
1993-12-31	1589
1994-03-31	1726
1994-06-30	1746
1994-09-30	1753
1994-12-31	1800
1995-03-31	1707
1995-06-30	1844
1995-09-30	1806
1995-12-31	1749
1996-03-31	1724
1996-06-30	1959
1996-09-30	1779
1996-12-31	1951
1997-03-31	1840
1997-06-30	1774
1997-09-30	1763
1997-12-31	1762
1998-03-31	1615
1998-06-30	1676
1998-09-30	1704
1998-12-31	1793
1999-03-31	1654
1999-06-30	1495
1999-09-30	1416
1999-12-31	1789
2000-03-31	1484
2000-06-30	1498
2000-09-30	1348
2000-12-31	1441
2001-03-31	1803
2001-06-30	2346
2001-09-30	2597
2001-12-31	2762
2002-03-31	2787
2002-06-30	3167
2002-09-30	2986
2002-12-31	2556
2003-03-31	3051
2003-06-30	3375
2003-09-30	3146
2003-12-31	2986
2004-03-31	2710
2004-06-30	2848
2004-09-30	3294
2004-12-31	2975
2005-03-31	3181
2005-06-30	3213
2005-09-30	3928
2005-12-31	4655
2006-03-31	4628
2006-06-30	5086
2006-09-30	5056
2006-12-31	11801
2007-03-31	5427
2007-06-30	6784
2007-09-30	6348
2007-12-31	8421
2008-03-31	8125
2008-06-30	10702
2008-09-30	11361
2008-12-31	5147
2009-03-31	9712
2009-06-30	3468
2009-09-30	3725
2009-12-31	3571
2010-03-31	4319
2010-06-30	4765
2010-09-30	5851
2010-12-31	5650
2011-03-31	5725
2011-06-30	5705
2011-09-30	3638
2011-12-31	3703
2012-03-31	3687
2012-06-30	3824
2012-09-30	4329
2012-12-31	5111
2013-03-31	4155
2013-06-30	4271
2013-09-30	4047
2013-12-31	4041
2014-03-31	4282
2014-06-30	4236
2014-09-30	4273
2014-12-31	9336
2015-03-31	4378
2015-06-30	3523
2015-09-30	3473
2015-12-31	3318
2016-03-31	3013
2016-06-30	3169
2016-09-30	2955
2016-12-31	3608
2017-03-31	3251
2017-06-30	3044
2017-09-30	3041
2017-12-31	3927
2018-03-31	5003
2018-06-30	3837
2018-09-30	2984
2018-12-31	3781
2019-03-31	3863
2019-06-30	3865
2019-09-30	3722
2019-12-31	2672
2020-03-31	2444
2020-06-30	2748
2020-09-30	2572
2020-12-31	2554
2021-03-31	2361
2021-06-30	2610
2021-09-30	2377
2021-12-31	2389
2022-03-31	2203
2022-06-30	2251
2022-09-30	2035
2022-12-31	2914
2023-03-31	2540
2023-06-30	2766
2023-09-30	2809