Quarterly US dollars
1986-09-30 44121
1986-12-31 64142
1987-03-31 62998
1987-06-30 61401
1987-09-30 61517
1987-12-31 63452
1988-03-31 62975
1988-06-30 57443
1988-09-30 56513
1988-12-31 58516
1989-03-31 59624
1989-06-30 53136
1989-09-30 58161
1989-12-31 61940
1990-03-31 63249
1990-06-30 65527
1990-09-30 76714
1990-12-31 84047
1991-03-31 85602
1991-06-30 83160
1991-09-30 83369
1991-12-31 86077
1992-03-31 73368
1992-06-30 71633
1992-09-30 74366
1992-12-31 50055
1993-03-31 50441
1993-06-30 59787
1993-09-30 60573
1993-12-31 62007
1994-03-31 63916
1994-06-30 66120
1994-09-30 72371
1994-12-31 75603
1995-03-31 121504
1995-06-30 122453
1995-09-30 121078
1995-12-31 111752
1996-03-31 118328
1996-06-30 118706
1996-09-30 125053
1996-12-31 131768
1997-03-31 137122
1997-06-30 138353
1997-09-30 71654
1997-12-31 62602
1998-03-31 68036
1998-06-30 64171
1998-09-30 64653
1998-12-31 63353
1999-03-31 63519
1999-06-30 64697
1999-09-30 67261
1999-12-31 67622
2000-03-31 65970
2000-06-30 72735
2000-09-30 73294
2000-12-31 79222
2001-03-31 81400
2001-06-30 85995
2001-09-30 91688
2001-12-31 92778
2002-03-31 92529
2002-06-30 104042
2002-09-30 120234
2002-12-31 129109
2003-03-31 131408
2003-06-30 134851
2003-09-30 150260
2003-12-31 167525
2004-03-31 172335
2004-06-30 185181
2004-09-30 196872
2004-12-31 215570
2005-03-31 214865
2005-06-30 219133
2005-09-30 222515
2005-12-31 229924
2006-03-31 248330
2006-06-30 272860
2006-09-30 282596
2006-12-31 282096
2007-03-31 309081
2007-06-30 337442
2007-09-30 361351
2007-12-31 399801
2008-03-31 427256
2008-06-30 445998
2008-09-30 429859
2008-12-31 423076
2009-03-31 410487
2009-06-30 429006
2009-09-30 469654
2009-12-31 486599
2010-03-31 490437
2010-06-30 469224
2010-09-30 518712
2010-12-31 523847
2011-03-31 552384
2011-06-30 570110
2011-09-30 527844
2011-12-31 553156
2012-03-31 561380
2012-06-30 542936
2012-09-30 540732
2012-12-31 537680
2013-03-31 506998
2013-06-30 483239
2013-09-30 504671
2013-12-31 502920
2014-03-31 490710
2014-06-30 511992
2014-09-30 493671
2014-12-31 463743
2015-03-31 464267
2015-06-30 478174
2015-09-30 459174
2015-12-31 455816