Quarterly US dollars
1986-09-30 45609
1986-12-31 49579
1987-03-31 55726
1987-06-30 56146
1987-09-30 61148
1987-12-31 72188
1988-03-31 76948
1988-06-30 77251
1988-09-30 77846
1988-12-31 76964
1989-03-31 70085
1989-06-30 69130
1989-09-30 71955
1989-12-31 73748
1990-03-31 77098
1990-06-30 85055
1990-09-30 93424
1990-12-31 97401
1991-03-31 88989
1991-06-30 76911
1991-09-30 80280
1991-12-31 82970
1992-03-31 78136
1992-06-30 92311
1992-09-30 107826
1992-12-31 86265
1993-03-31 86730
1993-06-30 84819
1993-09-30 87569
1993-12-31 99288
1994-03-31 88862
1994-06-30 92172
1994-09-30 99594
1994-12-31 105813
1995-03-31 103143
1995-06-30 114700
1995-09-30 109195
1995-12-31 111585
1996-03-31 109004
1996-06-30 112198
1996-09-30 120832
1996-12-31 141519
1997-03-31 155305
1997-06-30 167531
1997-09-30 165214
1997-12-31 192112
1998-03-31 204611
1998-06-30 194390
1998-09-30 207390
1998-12-31 205251
1999-03-31 202548
1999-06-30 190403
1999-09-30 198375
1999-12-31 184795
2000-03-31 213167
2000-06-30 205990
2000-09-30 216856
2000-12-31 212350
2001-03-31 224747
2001-06-30 202010
2001-09-30 232451
2001-12-31 230104
2002-03-31 230599
2002-06-30 237356
2002-09-30 234849
2002-12-31 250069
2003-03-31 252764
2003-06-30 281687
2003-09-30 279879
2003-12-31 316622
2004-03-31 385478
2004-06-30 380946
2004-09-30 323744
2004-12-31 351263
2005-03-31 399603
2005-06-30 383134
2005-09-30 390233
2005-12-31 422312
2006-03-31 462005
2006-06-30 543718
2006-09-30 534821
2006-12-31 626376
2007-03-31 806758
2007-06-30 824065
2007-09-30 851988
2007-12-31 915403
2008-03-31 930108
2008-06-30 833479
2008-09-30 765470
2008-12-31 623471
2009-03-31 647650
2009-06-30 676745
2009-09-30 558366
2009-12-31 551711
2010-03-31 540829
2010-06-30 526499
2010-09-30 565174
2010-12-31 530435
2011-03-31 511386
2011-06-30 503635
2011-09-30 503842
2011-12-31 456161
2012-03-31 493850
2012-06-30 479971
2012-09-30 492890
2012-12-31 459310
2013-03-31 405542
2013-06-30 417466
2013-09-30 422594
2013-12-31 441612
2014-03-31 466818
2014-06-30 474946
2014-09-30 455297
2014-12-31 435614
2015-03-31 430538
2015-06-30 466879
2015-09-30 463490
2015-12-31 438341