Quarter	US dollars
1986-09-30	3254
1986-12-31	3143
1987-03-31	3150
1987-06-30	3266
1987-09-30	3077
1987-12-31	3076
1988-03-31	3068
1988-06-30	3192
1988-09-30	3131
1988-12-31	3214
1989-03-31	3352
1989-06-30	3379
1989-09-30	3165
1989-12-31	2863
1990-03-31	2694
1990-06-30	2593
1990-09-30	2457
1990-12-31	2990
1991-03-31	2431
1991-06-30	2794
1991-09-30	2906
1991-12-31	2914
1992-03-31	2665
1992-06-30	2560
1992-09-30	2578
1992-12-31	2525
1993-03-31	2368
1993-06-30	2096
1993-09-30	2260
1993-12-31	2558
1994-03-31	2182
1994-06-30	2141
1994-09-30	2130
1994-12-31	1939
1995-03-31	1843
1995-06-30	1752
1995-09-30	1618
1995-12-31	1563
1996-03-31	1505
1996-06-30	1395
1996-09-30	1483
1996-12-31	1680
1997-03-31	2107
1997-06-30	1938
1997-09-30	1951
1997-12-31	2022
1998-03-31	2112
1998-06-30	1877
1998-09-30	1919
1998-12-31	1792
1999-03-31	1635
1999-06-30	1623
1999-09-30	1604
1999-12-31	1528
2000-03-31	1656
2000-06-30	1573
2000-09-30	1515
2000-12-31	1540
2001-03-31	1529
2001-06-30	1448
2001-09-30	1757
2001-12-31	1804
2002-03-31	1853
2002-06-30	2112
2002-09-30	2128
2002-12-31	2216
2003-03-31	1981
2003-06-30	1836
2003-09-30	1788
2003-12-31	1707
2004-03-31	1882
2004-06-30	1633
2004-09-30	1827
2004-12-31	1845
2005-03-31	1583
2005-06-30	2152
2005-09-30	3150
2005-12-31	3616
2006-03-31	3067
2006-06-30	2768
2006-09-30	2297
2006-12-31	1416
2007-03-31	1268
2007-06-30	1356
2007-09-30	1205
2007-12-31	1051
2008-03-31	554
2008-06-30	760
2008-09-30	1339
2008-12-31	1035
2009-03-31	901
2009-06-30	780
2009-09-30	1124
2009-12-31	1023
2010-03-31	1152
2010-06-30	1101
2010-09-30	1697
2010-12-31	1821
2011-03-31	1798
2011-06-30	1468
2011-09-30	1192
2011-12-31	1010
2012-03-31	1161
2012-06-30	1003
2012-09-30	1165
2012-12-31	1030
2013-03-31	759
2013-06-30	706
2013-09-30	541
2013-12-31	467
2014-03-31	334
2014-06-30	386
2014-09-30	469
2014-12-31	263
2015-03-31	719
2015-06-30	2612
2015-09-30	2586
2015-12-31	2497
2016-03-31	2541
2016-06-30	2563
2016-09-30	2520
2016-12-31	2415
2017-03-31	2391
2017-06-30	2403
2017-09-30	2648
2017-12-31	2186
2018-03-31	2216
2018-06-30	1690
2018-09-30	1675
2018-12-31	1713
2019-03-31	564
2019-06-30	142
2019-09-30	77
2019-12-31	28
2020-03-31	38
2020-06-30	30
2020-09-30	36
2020-12-31	59
2021-03-31	10
2021-06-30	26
2021-09-30	11
2021-12-31	35
2022-03-31	84
2022-06-30	114
2022-09-30	67
2022-12-31	61
2023-03-31	83
2023-06-30	53
2023-09-30	43