Quarter	US dollars
1986-09-30	1140
1986-12-31	1410
1987-03-31	1598
1987-06-30	1549
1987-09-30	1924
1987-12-31	1938
1988-03-31	2083
1988-06-30	2182
1988-09-30	2058
1988-12-31	2121
1989-03-31	1891
1989-06-30	2620
1989-09-30	2461
1989-12-31	2226
1990-03-31	2088
1990-06-30	2159
1990-09-30	2329
1990-12-31	1987
1991-03-31	2037
1991-06-30	1938
1991-09-30	2380
1991-12-31	2212
1992-03-31	1826
1992-06-30	2033
1992-09-30	4236
1992-12-31	2007
1993-03-31	2511
1993-06-30	2776
1993-09-30	2752
1993-12-31	2705
1994-03-31	2472
1994-06-30	2134
1994-09-30	2130
1994-12-31	1655
1995-03-31	1742
1995-06-30	1142
1995-09-30	1391
1995-12-31	854
1996-03-31	1322
1996-06-30	948
1996-09-30	696
1996-12-31	830
1997-03-31	920
1997-06-30	890
1997-09-30	1102
1997-12-31	1403
1998-03-31	112
1998-06-30	356
1998-09-30	682
1998-12-31	255
1999-03-31	175
1999-06-30	831
1999-09-30	108
1999-12-31	269
2000-03-31	283
2000-06-30	488
2000-09-30	576
2000-12-31	644
2001-03-31	423
2001-06-30	495
2001-09-30	540
2001-12-31	513
2002-03-31	443
2002-06-30	761
2002-09-30	487
2002-12-31	918
2003-03-31	805
2003-06-30	328
2003-09-30	571
2003-12-31	273
2004-03-31	348
2004-06-30	154
2004-09-30	650
2004-12-31	301
2005-03-31	593
2005-06-30	1030
2005-09-30	692
2005-12-31	1765
2006-03-31	690
2006-06-30	3520
2006-09-30	3004
2006-12-31	1187
2007-03-31	1457
2007-06-30	1307
2007-09-30	1387
2007-12-31	2895
2008-03-31	3364
2008-06-30	3493
2008-09-30	925
2008-12-31	3088
2009-03-31	2368
2009-06-30	2003
2009-09-30	778
2009-12-31	1079
2010-03-31	1174
2010-06-30	1113
2010-09-30	1482
2010-12-31	426
2011-03-31	582
2011-06-30	537
2011-09-30	2273
2011-12-31	5134
2012-03-31	1734
2012-06-30	918
2012-09-30	1681
2012-12-31	2593
2013-03-31	2275
2013-06-30	3425
2013-09-30	3391
2013-12-31	3075
2014-03-31	3886
2014-06-30	4246
2014-09-30	1837
2014-12-31	3164
2015-03-31	2717
2015-06-30	1902
2015-09-30	2912
2015-12-31	4040