Quarter	US dollars
1986-09-30	494920
1986-12-31	512272
1987-03-31	537298
1987-06-30	560356
1987-09-30	586907
1987-12-31	647250
1988-03-31	632073
1988-06-30	624471
1988-09-30	649137
1988-12-31	656119
1989-03-31	660435
1989-06-30	642248
1989-09-30	665235
1989-12-31	687687
1990-03-31	691631
1990-06-30	703698
1990-09-30	769765
1990-12-31	797241
1991-03-31	742763
1991-06-30	695894
1991-09-30	705077
1991-12-31	704476
1992-03-31	661874
1992-06-30	688953
1992-09-30	739277
1992-12-31	712809
1993-03-31	683005
1993-06-30	679913
1993-09-30	692894
1993-12-31	708157
1994-03-31	742921
1994-06-30	779935
1994-09-30	823430
1994-12-31	854523
1995-03-31	924122
1995-06-30	917057
1995-09-30	914511
1995-12-31	931818
1996-03-31	936192
1996-06-30	926611
1996-09-30	941598
1996-12-31	977866
1997-03-31	1010169
1997-06-30	1038884
1997-09-30	1036973
1997-12-31	1135874
1998-03-31	1117602
1998-06-30	1133805
1998-09-30	1259535
1998-12-31	1253327
1999-03-31	1200627
1999-06-30	1133256
1999-09-30	1207927
1999-12-31	1175056
2000-03-31	1238279
2000-06-30	1267835
2000-09-30	1233507
2000-12-31	1340916
2001-03-31	1393518
2001-06-30	1300196
2001-09-30	1354421
2001-12-31	1355539
2002-03-31	1293259
2002-06-30	1333665
2002-09-30	1372108
2002-12-31	1523192
2003-03-31	1543088
2003-06-30	1688890
2003-09-30	1627046
2003-12-31	1823680
2004-03-31	2010442
2004-06-30	2012011
2004-09-30	2005750
2004-12-31	2110194
2005-03-31	2186178
2005-06-30	2206278
2005-09-30	2186853
2005-12-31	2211137
2006-03-31	2429706
2006-06-30	2565094
2006-09-30	2602336
2006-12-31	2628470
2007-03-31	2982794
2007-06-30	3059158
2007-09-30	3315100
2007-12-31	3525782
2008-03-31	3978329
2008-06-30	3579406
2008-09-30	3409245
2008-12-31	3175403
2009-03-31	3079100
2009-06-30	3139652
2009-09-30	3064005
2009-12-31	3068738
2010-03-31	3024100
2010-06-30	2976695
2010-09-30	3186141
2010-12-31	2960893
2011-03-31	3058020
2011-06-30	3066845
2011-09-30	3365702
2011-12-31	3214730
2012-03-31	3315373
2012-06-30	3086352
2012-09-30	3062167
2012-12-31	2987742
2013-03-31	2850963
2013-06-30	2769804
2013-09-30	2739958
2013-12-31	2655131
2014-03-31	2707787
2014-06-30	2700262
2014-09-30	2625596
2014-12-31	2508276
2015-03-31	2384714
2015-06-30	2396881
2015-09-30	2313791
2015-12-31	2294819