Quarterly 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