Quarter	US dollars
1986-09-30	183741
1986-12-31	189807
1987-03-31	198692
1987-06-30	196132
1987-09-30	198738
1987-12-31	213746
1988-03-31	213761
1988-06-30	203906
1988-09-30	198931
1988-12-31	210853
1989-03-31	206389
1989-06-30	203578
1989-09-30	213268
1989-12-31	220475
1990-03-31	229386
1990-06-30	235959
1990-09-30	256048
1990-12-31	261461
1991-03-31	257053
1991-06-30	255874
1991-09-30	277340
1991-12-31	271010
1992-03-31	268970
1992-06-30	284493
1992-09-30	309137
1992-12-31	292035
1993-03-31	313537
1993-06-30	311330
1993-09-30	312716
1993-12-31	323037
1994-03-31	319879
1994-06-30	318421
1994-09-30	324892
1994-12-31	334335
1995-03-31	368823
1995-06-30	379222
1995-09-30	384892
1995-12-31	405806
1996-03-31	419280
1996-06-30	433519
1996-09-30	466610
1996-12-31	476712
1997-03-31	497038
1997-06-30	492807
1997-09-30	497752
1997-12-31	544654
1998-03-31	572859
1998-06-30	621618
1998-09-30	648871
1998-12-31	611819
1999-03-31	597609
1999-06-30	605204
1999-09-30	617044
1999-12-31	613565
2000-03-31	669625
2000-06-30	677605
2000-09-30	705793
2000-12-31	709562
2001-03-31	780167
2001-06-30	779421
2001-09-30	819140
2001-12-31	802022
2002-03-31	835615
2002-06-30	917109
2002-09-30	943692
2002-12-31	939254
2003-03-31	1051326
2003-06-30	1104818
2003-09-30	1171273
2003-12-31	1174752
2004-03-31	1309265
2004-06-30	1281696
2004-09-30	1370873
2004-12-31	1494274
2005-03-31	1584799
2005-06-30	1646453
2005-09-30	1699349
2005-12-31	1667281
2006-03-31	1854082
2006-06-30	1925538
2006-09-30	2053873
2006-12-31	2221220
2007-03-31	2470885
2007-06-30	2667120
2007-09-30	2837643
2007-12-31	2879383
2008-03-31	3012781
2008-06-30	2800922
2008-09-30	2727549
2008-12-31	2284058
2009-03-31	2213015
2009-06-30	2202254
2009-09-30	2268026
2009-12-31	2134736
2010-03-31	2174764
2010-06-30	2055970
2010-09-30	2274507
2010-12-31	2289385
2011-03-31	2414230
2011-06-30	2473692
2011-09-30	2410172
2011-12-31	2321149
2012-03-31	2388900
2012-06-30	2351989
2012-09-30	2345385
2012-12-31	2315209
2013-03-31	2254876
2013-06-30	2210208
2013-09-30	2117696
2013-12-31	2136448
2014-03-31	2210692
2014-06-30	2257510
2014-09-30	2194428
2014-12-31	2154506
2015-03-31	2129485
2015-06-30	2053478
2015-09-30	2094758
2015-12-31	1989038