Quarter	US dollars
1986-09-30	5634
1986-12-31	4808
1987-03-31	5365
1987-06-30	8170
1987-09-30	8618
1987-12-31	12652
1988-03-31	12838
1988-06-30	14480
1988-09-30	13798
1988-12-31	13737
1989-03-31	12714
1989-06-30	12531
1989-09-30	12734
1989-12-31	12290
1990-03-31	13138
1990-06-30	13185
1990-09-30	13794
1990-12-31	14058
1991-03-31	11582
1991-06-30	9931
1991-09-30	10085
1991-12-31	9739
1992-03-31	7694
1992-06-30	7299
1992-09-30	7498
1992-12-31	6167
1993-03-31	6720
1993-06-30	7027
1993-09-30	7804
1993-12-31	7032
1994-03-31	7271
1994-06-30	6336
1994-09-30	6587
1994-12-31	8901
1995-03-31	9120
1995-06-30	10249
1995-09-30	8059
1995-12-31	6851
1996-03-31	7039
1996-06-30	8195
1996-09-30	8200
1996-12-31	6713
1997-03-31	8282
1997-06-30	6901
1997-09-30	9156
1997-12-31	7624
1998-03-31	8993
1998-06-30	7911
1998-09-30	7858
1998-12-31	4322
1999-03-31	2584
1999-06-30	2420
1999-09-30	2321
1999-12-31	5053
2000-03-31	2937
2000-06-30	2189
2000-09-30	3885
2000-12-31	5736
2001-03-31	5044
2001-06-30	3295
2001-09-30	2808
2001-12-31	1841
2002-03-31	1839
2002-06-30	1258
2002-09-30	940
2002-12-31	559
2003-03-31	675
2003-06-30	663
2003-09-30	808
2003-12-31	709
2004-03-31	1655
2004-06-30	2107
2004-09-30	971
2004-12-31	1732
2005-03-31	3771
2005-06-30	2152
2005-09-30	3010
2005-12-31	3548
2006-03-31	2339
2006-06-30	5685
2006-09-30	3923
2006-12-31	4440
2007-03-31	5174
2007-06-30	5043
2007-09-30	5140
2007-12-31	15630
2008-03-31	15397
2008-06-30	11158
2008-09-30	10696
2008-12-31	8463
2009-03-31	5006
2009-06-30	4714
2009-09-30	7476
2009-12-31	9680
2010-03-31	8588
2010-06-30	4285
2010-09-30	9347
2010-12-31	10330
2011-03-31	5681
2011-06-30	7835
2011-09-30	2710
2011-12-31	1544
2012-03-31	3038
2012-06-30	1924
2012-09-30	3627
2012-12-31	4284
2013-03-31	7555
2013-06-30	4064
2013-09-30	3934
2013-12-31	3000
2014-03-31	2213
2014-06-30	3455
2014-09-30	1923
2014-12-31	4446
2015-03-31	4477
2015-06-30	11728
2015-09-30	4403
2015-12-31	4490