Quarter	US dollars
1986-09-30	586
1986-12-31	595
1987-03-31	913
1987-06-30	738
1987-09-30	718
1987-12-31	678
1988-03-31	610
1988-06-30	554
1988-09-30	447
1988-12-31	496
1989-03-31	456
1989-06-30	427
1989-09-30	459
1989-12-31	416
1990-03-31	426
1990-06-30	610
1990-09-30	644
1990-12-31	663
1991-03-31	683
1991-06-30	647
1991-09-30	804
1991-12-31	938
1992-03-31	922
1992-06-30	963
1992-09-30	911
1992-12-31	732
1993-03-31	780
1993-06-30	679
1993-09-30	691
1993-12-31	648
1994-03-31	671
1994-06-30	614
1994-09-30	652
1994-12-31	744
1995-03-31	665
1995-06-30	644
1995-09-30	717
1995-12-31	688
1996-03-31	749
1996-06-30	758
1996-09-30	767
1996-12-31	858
1997-03-31	866
1997-06-30	824
1997-09-30	785
1997-12-31	861
1998-03-31	876
1998-06-30	744
1998-09-30	759
1998-12-31	825
1999-03-31	761
1999-06-30	822
1999-09-30	714
1999-12-31	713
2000-03-31	781
2000-06-30	954
2000-09-30	1144
2000-12-31	1251
2001-03-31	1339
2001-06-30	1288
2001-09-30	1365
2001-12-31	1166
2002-03-31	1080
2002-06-30	1067
2002-09-30	1092
2002-12-31	1181
2003-03-31	1431
2003-06-30	1492
2003-09-30	1959
2003-12-31	2078
2004-03-31	2134
2004-06-30	2130
2004-09-30	2178
2004-12-31	2380
2005-03-31	2405
2005-06-30	2277
2005-09-30	2163
2005-12-31	2211
2006-03-31	2515
2006-06-30	2590
2006-09-30	2758
2006-12-31	2825
2007-03-31	2867
2007-06-30	2758
2007-09-30	2721
2007-12-31	2646
2008-03-31	2685
2008-06-30	2703
2008-09-30	2868
2008-12-31	2841
2009-03-31	2600
2009-06-30	1645
2009-09-30	1561
2009-12-31	1334
2010-03-31	1311
2010-06-30	1147
2010-09-30	1363
2010-12-31	884
2011-03-31	911
2011-06-30	804
2011-09-30	499
2011-12-31	662
2012-03-31	807
2012-06-30	652
2012-09-30	673
2012-12-31	653
2013-03-31	868
2013-06-30	636
2013-09-30	707
2013-12-31	667
2014-03-31	607
2014-06-30	580
2014-09-30	453
2014-12-31	451
2015-03-31	340
2015-06-30	521
2015-09-30	323
2015-12-31	211
2016-03-31	173
2016-06-30	127
2016-09-30	187
2016-12-31	130
2017-03-31	128
2017-06-30	125
2017-09-30	125
2017-12-31	116
2018-03-31	116
2018-06-30	103
2018-09-30	105
2018-12-31	109
2019-03-31	104
2019-06-30	105
2019-09-30	95
2019-12-31	168
2020-03-31	157
2020-06-30	153
2020-09-30	144
2020-12-31	150
2021-03-31	148
2021-06-30	146
2021-09-30	87
2021-12-31	86
2022-03-31	85
2022-06-30	84
2022-09-30	82
2022-12-31	83
2023-03-31	83
2023-06-30	84
2023-09-30	87