Quarterly US dollars
1986-09-30 25628
1986-12-31 27868
1987-03-31 32160
1987-06-30 34448
1987-09-30 37909
1987-12-31 43002
1988-03-31 48810
1988-06-30 55685
1988-09-30 59234
1988-12-31 57744
1989-03-31 56694
1989-06-30 56042
1989-09-30 63616
1989-12-31 63740
1990-03-31 70363
1990-06-30 72389
1990-09-30 81568
1990-12-31 90354
1991-03-31 83938
1991-06-30 71679
1991-09-30 73314
1991-12-31 72740
1992-03-31 68076
1992-06-30 74583
1992-09-30 76162
1992-12-31 61502
1993-03-31 61318
1993-06-30 58692
1993-09-30 56290
1993-12-31 58220
1994-03-31 56197
1994-06-30 56178
1994-09-30 69991
1994-12-31 75440
1995-03-31 88597
1995-06-30 92946
1995-09-30 89628
1995-12-31 84231
1996-03-31 80046
1996-06-30 72511
1996-09-30 74445
1996-12-31 89876
1997-03-31 91878
1997-06-30 92821
1997-09-30 131310
1997-12-31 143825
1998-03-31 149140
1998-06-30 154275
1998-09-30 169445
1998-12-31 175279
1999-03-31 181247
1999-06-30 183116
1999-09-30 207462
1999-12-31 206638
2000-03-31 213572
2000-06-30 210777
2000-09-30 208217
2000-12-31 226808
2001-03-31 239903
2001-06-30 219995
2001-09-30 234428
2001-12-31 241782
2002-03-31 238321
2002-06-30 251493
2002-09-30 263963
2002-12-31 269043
2003-03-31 275324
2003-06-30 296411
2003-09-30 299688
2003-12-31 321800
2004-03-31 362127
2004-06-30 359836
2004-09-30 345221
2004-12-31 378019
2005-03-31 382543
2005-06-30 373552
2005-09-30 378670
2005-12-31 359411
2006-03-31 363522
2006-06-30 433549
2006-09-30 452389
2006-12-31 497880
2007-03-31 666117
2007-06-30 680322
2007-09-30 745181
2007-12-31 857327
2008-03-31 890065
2008-06-30 809976
2008-09-30 732049
2008-12-31 585226
2009-03-31 621531
2009-06-30 679036
2009-09-30 619653
2009-12-31 581690
2010-03-31 544538
2010-06-30 537690
2010-09-30 568753
2010-12-31 516328
2011-03-31 468400
2011-06-30 480070
2011-09-30 434026
2011-12-31 408109
2012-03-31 438535
2012-06-30 447752
2012-09-30 472449
2012-12-31 476857
2013-03-31 410397
2013-06-30 412934
2013-09-30 442188
2013-12-31 419655
2014-03-31 438447
2014-06-30 438985
2014-09-30 401494
2014-12-31 392416
2015-03-31 389249
2015-06-30 426789
2015-09-30 457303
2015-12-31 438187